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28
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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58
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9 #include <ngx_event_connect.h>
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28
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10 #include <ngx_http.h>
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11
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12
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58
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13 static void ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r);
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14 static void ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r);
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15 static void ngx_http_upstream_check_broken_connection(ngx_http_request_t *r,
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16 ngx_event_t *ev);
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28
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17 static void ngx_http_upstream_connect(ngx_http_request_t *r,
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36
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18 ngx_http_upstream_t *u);
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58
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19 static ngx_int_t ngx_http_upstream_reinit(ngx_http_request_t *r,
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36
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20 ngx_http_upstream_t *u);
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28
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21 static void ngx_http_upstream_send_request(ngx_http_request_t *r,
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36
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22 ngx_http_upstream_t *u);
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28
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23 static void ngx_http_upstream_send_request_handler(ngx_event_t *wev);
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24 static void ngx_http_upstream_process_header(ngx_event_t *rev);
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25 static void ngx_http_upstream_send_response(ngx_http_request_t *r,
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36
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26 ngx_http_upstream_t *u);
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58
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27 static void ngx_http_upstream_process_downstream(ngx_http_request_t *r);
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28
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28 static void ngx_http_upstream_process_body(ngx_event_t *ev);
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29 static void ngx_http_upstream_dummy_handler(ngx_event_t *wev);
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30 static void ngx_http_upstream_next(ngx_http_request_t *r,
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36
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31 ngx_http_upstream_t *u, ngx_uint_t ft_type);
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28
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32 static void ngx_http_upstream_finalize_request(ngx_http_request_t *r,
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36
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33 ngx_http_upstream_t *u, ngx_int_t rc);
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28
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34
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58
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35 static ngx_int_t ngx_http_upstream_process_header_line(ngx_http_request_t *r,
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36 ngx_table_elt_t *h, ngx_uint_t offset);
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37 static ngx_int_t
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38 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
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39 ngx_table_elt_t *h, ngx_uint_t offset);
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40 static ngx_int_t ngx_http_upstream_ignore_header_line(ngx_http_request_t *r,
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41 ngx_table_elt_t *h, ngx_uint_t offset);
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76
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42 static ngx_int_t ngx_http_upstream_process_limit_rate(ngx_http_request_t *r,
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43 ngx_table_elt_t *h, ngx_uint_t offset);
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58
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44 static ngx_int_t ngx_http_upstream_copy_header_line(ngx_http_request_t *r,
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45 ngx_table_elt_t *h, ngx_uint_t offset);
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46 static ngx_int_t
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47 ngx_http_upstream_conditional_copy_header_line(ngx_http_request_t *r,
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48 ngx_table_elt_t *h, ngx_uint_t offset);
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49 static ngx_int_t
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50 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
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51 ngx_table_elt_t *h, ngx_uint_t offset);
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52 static ngx_int_t ngx_http_upstream_copy_content_type(ngx_http_request_t *r,
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53 ngx_table_elt_t *h, ngx_uint_t offset);
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54 static ngx_int_t ngx_http_upstream_copy_content_length(ngx_http_request_t *r,
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55 ngx_table_elt_t *h, ngx_uint_t offset);
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56 static ngx_int_t ngx_http_upstream_rewrite_location(ngx_http_request_t *r,
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57 ngx_table_elt_t *h, ngx_uint_t offset);
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58 static ngx_int_t ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r,
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59 ngx_table_elt_t *h, ngx_uint_t offset);
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60 #if (NGX_HTTP_GZIP)
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61 static ngx_int_t ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
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62 ngx_table_elt_t *h, ngx_uint_t offset);
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63 #endif
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64
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28
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65 static size_t ngx_http_upstream_log_status_getlen(ngx_http_request_t *r,
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36
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66 uintptr_t data);
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67 static u_char *ngx_http_upstream_log_status(ngx_http_request_t *r,
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68 u_char *buf, ngx_http_log_op_t *op);
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28
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69
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70 static u_char *ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf,
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71 size_t len);
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28
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72 static ngx_int_t ngx_http_upstream_add_log_formats(ngx_conf_t *cf);
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58
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73 static void *ngx_http_upstream_create_main_conf(ngx_conf_t *cf);
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74 static char *ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf);
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75
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76
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77 ngx_http_upstream_header_t ngx_http_upstream_headers_in[] = {
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78
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79 { ngx_string("Status"),
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80 ngx_http_upstream_process_header_line,
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81 offsetof(ngx_http_upstream_headers_in_t, status),
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64
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82 /* STUB */ ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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83
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84 { ngx_string("Content-Type"),
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85 ngx_http_upstream_process_header_line,
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86 offsetof(ngx_http_upstream_headers_in_t, content_type),
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64
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87 ngx_http_upstream_copy_content_type, 0, 0 },
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58
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88
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89 { ngx_string("Content-Length"),
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90 ngx_http_upstream_process_header_line,
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91 offsetof(ngx_http_upstream_headers_in_t, content_length),
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92 ngx_http_upstream_copy_content_length, 0, 0 },
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58
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93
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94 { ngx_string("Date"),
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95 ngx_http_upstream_process_header_line,
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96 offsetof(ngx_http_upstream_headers_in_t, date),
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97 ngx_http_upstream_conditional_copy_header_line,
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64
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98 offsetof(ngx_http_upstream_conf_t, pass_date), 0 },
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58
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99
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100 { ngx_string("Server"),
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101 ngx_http_upstream_process_header_line,
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102 offsetof(ngx_http_upstream_headers_in_t, server),
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103 ngx_http_upstream_conditional_copy_header_line,
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104 offsetof(ngx_http_upstream_conf_t, pass_server), 0 },
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58
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105
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78
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106 { ngx_string("WWW-Authenticate"),
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107 ngx_http_upstream_process_header_line,
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108 offsetof(ngx_http_upstream_headers_in_t, www_authenticate),
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109 ngx_http_upstream_copy_header_line, 0, 0 },
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110
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58
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111 { ngx_string("Location"),
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112 ngx_http_upstream_ignore_header_line, 0,
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64
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113 ngx_http_upstream_rewrite_location, 0, 0 },
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58
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114
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115 { ngx_string("Refresh"),
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116 ngx_http_upstream_ignore_header_line, 0,
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64
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117 ngx_http_upstream_rewrite_refresh, 0, 0 },
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118
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119 { ngx_string("Set-Cookie"),
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120 ngx_http_upstream_ignore_header_line, 0,
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80
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121 ngx_http_upstream_copy_header_line, 0, 1 },
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122
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123 { ngx_string("Content-Disposition"),
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124 ngx_http_upstream_ignore_header_line, 0,
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125 ngx_http_upstream_copy_header_line, 0, 1 },
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58
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126
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127 { ngx_string("Cache-Control"),
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128 ngx_http_upstream_process_multi_header_lines,
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129 offsetof(ngx_http_upstream_headers_in_t, cache_control),
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130 ngx_http_upstream_copy_multi_header_lines,
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64
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131 offsetof(ngx_http_headers_out_t, cache_control), 1 },
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58
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132
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133 { ngx_string("Connection"),
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134 ngx_http_upstream_ignore_header_line, 0,
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64
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135 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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136
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137 { ngx_string("X-Pad"),
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138 ngx_http_upstream_ignore_header_line, 0,
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64
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139 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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140
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141 { ngx_string("X-Powered-By"),
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142 ngx_http_upstream_ignore_header_line, 0,
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143 ngx_http_upstream_conditional_copy_header_line,
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64
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144 offsetof(ngx_http_upstream_conf_t, pass_x_powered_by), 0 },
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58
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145
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146 { ngx_string("X-Accel-Expires"),
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147 ngx_http_upstream_process_header_line,
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148 offsetof(ngx_http_upstream_headers_in_t, x_accel_expires),
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149 ngx_http_upstream_conditional_copy_header_line,
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64
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150 offsetof(ngx_http_upstream_conf_t, pass_x_accel_expires), 0 },
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151
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152 { ngx_string("X-Accel-Redirect"),
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153 ngx_http_upstream_process_header_line,
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154 offsetof(ngx_http_upstream_headers_in_t, x_accel_redirect),
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155 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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156
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76
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157 { ngx_string("X-Accel-Limit-Rate"),
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158 ngx_http_upstream_process_limit_rate, 0,
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159 ngx_http_upstream_ignore_header_line, 0, 0 },
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160
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58
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161 #if (NGX_HTTP_GZIP)
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162 { ngx_string("Content-Encoding"),
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163 ngx_http_upstream_process_header_line,
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164 offsetof(ngx_http_upstream_headers_in_t, content_encoding),
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165 ngx_http_upstream_copy_content_encoding, 0, 0 },
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58
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166 #endif
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167
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64
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168 { ngx_null_string, NULL, 0, NULL, 0, 0 }
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58
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169 };
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170
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171
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172 ngx_http_module_t ngx_http_upstream_module_ctx = {
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173 ngx_http_upstream_add_log_formats, /* preconfiguration */
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174 NULL, /* postconfiguration */
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175
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176 ngx_http_upstream_create_main_conf, /* create main configuration */
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177 ngx_http_core_init_main_conf, /* init main configuration */
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28
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178
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179 NULL, /* create server configuration */
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180 NULL, /* merge server configuration */
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181
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182 NULL, /* create location configuration */
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183 NULL /* merge location configuration */
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184 };
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185
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186
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187 ngx_module_t ngx_http_upstream_module = {
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188 NGX_MODULE_V1,
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189 &ngx_http_upstream_module_ctx, /* module context */
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190 NULL, /* module directives */
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191 NGX_HTTP_MODULE, /* module type */
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90
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192 NULL, /* init master */
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193 NULL, /* init module */
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90
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194 NULL, /* init process */
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195 NULL, /* init thread */
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196 NULL, /* exit thread */
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197 NULL, /* exit process */
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198 NULL, /* exit master */
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199 NGX_MODULE_V1_PADDING
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200 };
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201
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202
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203 static ngx_http_log_op_name_t ngx_http_upstream_log_fmt_ops[] = {
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204 { ngx_string("upstream_status"), 0, NULL,
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205 ngx_http_upstream_log_status_getlen,
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206 ngx_http_upstream_log_status },
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207 { ngx_null_string, 0, NULL, NULL, NULL }
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208 };
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209
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210
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211 char *ngx_http_upstream_header_errors[] = {
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212 "upstream sent invalid header",
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213 "upstream sent too long header line"
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214 };
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215
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216
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36
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217 void
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218 ngx_http_upstream_init(ngx_http_request_t *r)
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28
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219 {
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220 ngx_connection_t *c;
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221 ngx_http_upstream_t *u;
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222 ngx_http_core_loc_conf_t *clcf;
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28
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223
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224 c = r->connection;
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225
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226 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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227 "http init upstream, client timer: %d", c->read->timer_set);
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228
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229 if (c->read->timer_set) {
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230 ngx_del_timer(c->read);
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231 }
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232
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233 r->read_event_handler = ngx_http_upstream_rd_check_broken_connection;
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234 r->write_event_handler = ngx_http_upstream_wr_check_broken_connection;
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28
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235
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236 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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237
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238 if (!c->write->active) {
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80
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239 if (ngx_add_event(c->write, NGX_WRITE_EVENT, NGX_CLEAR_EVENT)
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240 == NGX_ERROR)
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28
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241 {
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242 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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243 return;
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244 }
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245 }
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246 }
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247
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248 u = r->upstream;
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249
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86
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250 if (r->request_body) {
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251 u->request_bufs = r->request_body->bufs;
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252 }
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58
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253
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254 if (u->conf->method == NGX_CONF_UNSET_UINT) {
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255 u->method = r->method;
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256
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257 } else {
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258 u->method = u->conf->method;
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259 }
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260
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86
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261 if (u->create_request(r) != NGX_OK) {
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262 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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263 return;
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264 }
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265
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266 u->peer.log = r->connection->log;
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58
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267 u->saved_log_handler = r->log_handler;
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268 r->log_handler = ngx_http_upstream_log_error;
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269
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270 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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28
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271
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272 u->output.sendfile = r->connection->sendfile;
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273 u->output.pool = r->pool;
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274 u->output.bufs.num = 1;
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58
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275 u->output.bufs.size = clcf->client_body_buffer_size;
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28
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276 u->output.output_filter = ngx_chain_writer;
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277 u->output.filter_ctx = &u->writer;
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278
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279 u->writer.pool = r->pool;
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280
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281 if (ngx_array_init(&u->states, r->pool, u->peer.peers->number,
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50
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282 sizeof(ngx_http_upstream_state_t)) != NGX_OK)
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28
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283 {
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284 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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285 return;
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286 }
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287
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50
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288 u->state = ngx_array_push(&u->states);
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289 if (u->state == NULL) {
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28
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290 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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291 return;
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292 }
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293
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294 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
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295
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296 ngx_http_upstream_connect(r, u);
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297 }
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298
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299
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36
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300 static void
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58
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301 ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r)
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302 {
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303 ngx_http_upstream_check_broken_connection(r, r->connection->read);
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304 }
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305
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306
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307 static void
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308 ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r)
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309 {
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310 ngx_http_upstream_check_broken_connection(r, r->connection->write);
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311 }
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312
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313
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314 static void
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315 ngx_http_upstream_check_broken_connection(ngx_http_request_t *r,
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316 ngx_event_t *ev)
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28
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317 {
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318 int n;
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319 char buf[1];
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320 ngx_err_t err;
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321 ngx_connection_t *c;
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322 ngx_http_upstream_t *u;
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323
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76
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324 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ev->log, 0,
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325 "http upstream check client, write event:%d, \"%V\"",
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326 ev->write, &r->uri);
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28
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327
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58
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328 c = r->connection;
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32
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329 u = r->upstream;
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330
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76
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331 if (c->closed) {
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332 ngx_http_upstream_finalize_request(r, u,
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333 NGX_HTTP_CLIENT_CLOSED_REQUEST);
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334 return;
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335 }
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336
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32
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337 if (u->peer.connection == NULL) {
|
|
|
338 return;
|
|
|
339 }
|
|
|
340
|
|
28
|
341 #if (NGX_HAVE_KQUEUE)
|
|
|
342
|
|
|
343 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
|
344
|
|
|
345 if (!ev->pending_eof) {
|
|
|
346 return;
|
|
|
347 }
|
|
|
348
|
|
|
349 ev->eof = 1;
|
|
76
|
350 c->closed = 1;
|
|
28
|
351
|
|
|
352 if (ev->kq_errno) {
|
|
|
353 ev->error = 1;
|
|
|
354 }
|
|
|
355
|
|
|
356 if (!u->cachable && u->peer.connection) {
|
|
|
357 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
|
76
|
358 "kevent() reported that client closed prematurely "
|
|
|
359 "connection, so upstream connection is closed too");
|
|
28
|
360 ngx_http_upstream_finalize_request(r, u,
|
|
|
361 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
362 return;
|
|
|
363 }
|
|
|
364
|
|
|
365 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
|
|
366 "kevent() reported that client closed "
|
|
|
367 "prematurely connection");
|
|
|
368
|
|
|
369 if (u->peer.connection == NULL) {
|
|
|
370 ngx_http_upstream_finalize_request(r, u,
|
|
|
371 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
372 return;
|
|
|
373 }
|
|
|
374
|
|
|
375 return;
|
|
|
376 }
|
|
|
377
|
|
|
378 #endif
|
|
|
379
|
|
|
380 n = recv(c->fd, buf, 1, MSG_PEEK);
|
|
|
381
|
|
|
382 err = ngx_socket_errno;
|
|
|
383
|
|
|
384 /*
|
|
|
385 * we do not need to disable the write event because
|
|
|
386 * that event has NGX_USE_CLEAR_EVENT type
|
|
|
387 */
|
|
|
388
|
|
|
389 if (ev->write && (n >= 0 || err == NGX_EAGAIN)) {
|
|
|
390 return;
|
|
|
391 }
|
|
|
392
|
|
|
393 if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) {
|
|
|
394 if (ngx_del_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
|
395 ngx_http_upstream_finalize_request(r, u,
|
|
|
396 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
397 return;
|
|
|
398 }
|
|
|
399 }
|
|
|
400
|
|
|
401 if (n > 0) {
|
|
|
402 return;
|
|
|
403 }
|
|
|
404
|
|
|
405 if (n == -1) {
|
|
|
406 if (err == NGX_EAGAIN) {
|
|
|
407 return;
|
|
|
408 }
|
|
|
409
|
|
|
410 ev->error = 1;
|
|
|
411
|
|
32
|
412 } else { /* n == 0 */
|
|
28
|
413 err = 0;
|
|
|
414 }
|
|
|
415
|
|
78
|
416 ev->eof = 1;
|
|
|
417 c->closed = 1;
|
|
|
418
|
|
28
|
419 if (!u->cachable && u->peer.connection) {
|
|
|
420 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
|
421 "client closed prematurely connection, "
|
|
|
422 "so upstream connection is closed too");
|
|
|
423 ngx_http_upstream_finalize_request(r, u,
|
|
|
424 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
425 return;
|
|
|
426 }
|
|
|
427
|
|
|
428 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
|
429 "client closed prematurely connection");
|
|
|
430
|
|
|
431 if (u->peer.connection == NULL) {
|
|
|
432 ngx_http_upstream_finalize_request(r, u,
|
|
|
433 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
434 return;
|
|
|
435 }
|
|
|
436 }
|
|
|
437
|
|
|
438
|
|
36
|
439 static void
|
|
|
440 ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
441 {
|
|
|
442 ngx_int_t rc;
|
|
|
443 ngx_connection_t *c;
|
|
|
444
|
|
32
|
445 r->connection->log->action = "connecting to upstream";
|
|
28
|
446
|
|
|
447 r->connection->single_connection = 0;
|
|
|
448
|
|
|
449 rc = ngx_event_connect_peer(&u->peer);
|
|
|
450
|
|
|
451 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
452 "http upstream connect: %i", rc);
|
|
|
453
|
|
|
454 if (rc == NGX_ERROR) {
|
|
|
455 ngx_http_upstream_finalize_request(r, u,
|
|
|
456 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
457 return;
|
|
|
458 }
|
|
|
459
|
|
|
460 u->state->peer = &u->peer.peers->peer[u->peer.cur_peer].name;
|
|
|
461
|
|
92
|
462 if (rc == NGX_BUSY) {
|
|
|
463 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams");
|
|
|
464 }
|
|
|
465
|
|
|
466 if (rc == NGX_BUSY || rc == NGX_DECLINED) {
|
|
28
|
467 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
468 return;
|
|
|
469 }
|
|
|
470
|
|
|
471 c = u->peer.connection;
|
|
|
472
|
|
|
473 c->data = r;
|
|
58
|
474 c->write->handler = ngx_http_upstream_send_request_handler;
|
|
|
475 c->read->handler = ngx_http_upstream_process_header;
|
|
28
|
476
|
|
|
477 c->sendfile = r->connection->sendfile;
|
|
|
478
|
|
|
479 c->pool = r->pool;
|
|
|
480 c->read->log = c->write->log = c->log = r->connection->log;
|
|
|
481
|
|
|
482 /* init or reinit the ngx_output_chain() and ngx_chain_writer() contexts */
|
|
|
483
|
|
|
484 u->writer.out = NULL;
|
|
|
485 u->writer.last = &u->writer.out;
|
|
|
486 u->writer.connection = c;
|
|
|
487 u->writer.limit = 0;
|
|
|
488
|
|
|
489 if (u->request_sent) {
|
|
58
|
490 if (ngx_http_upstream_reinit(r, u) != NGX_OK) {
|
|
|
491 ngx_http_upstream_finalize_request(r, u,
|
|
|
492 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
493 return;
|
|
|
494 }
|
|
28
|
495 }
|
|
|
496
|
|
58
|
497 if (r->request_body) {
|
|
|
498 if (r->request_body->temp_file && r->main == NULL) {
|
|
|
499
|
|
|
500 /*
|
|
|
501 * the r->request_body->buf can be reused for one request only,
|
|
|
502 * the subrequests should allocate their own temporay bufs
|
|
|
503 */
|
|
28
|
504
|
|
50
|
505 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
|
506 if (u->output.free == NULL) {
|
|
28
|
507 ngx_http_upstream_finalize_request(r, u,
|
|
|
508 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
509 return;
|
|
|
510 }
|
|
|
511
|
|
|
512 u->output.free->buf = r->request_body->buf;
|
|
|
513 u->output.free->next = NULL;
|
|
|
514 u->output.allocated = 1;
|
|
|
515
|
|
|
516 r->request_body->buf->pos = r->request_body->buf->start;
|
|
|
517 r->request_body->buf->last = r->request_body->buf->start;
|
|
|
518 r->request_body->buf->tag = u->output.tag;
|
|
|
519 }
|
|
|
520 }
|
|
|
521
|
|
|
522 u->request_sent = 0;
|
|
|
523
|
|
|
524 if (rc == NGX_AGAIN) {
|
|
|
525 ngx_add_timer(c->write, u->conf->connect_timeout);
|
|
|
526 return;
|
|
|
527 }
|
|
|
528
|
|
|
529 /* rc == NGX_OK */
|
|
|
530
|
|
|
531 ngx_http_upstream_send_request(r, u);
|
|
|
532 }
|
|
|
533
|
|
|
534
|
|
58
|
535 static ngx_int_t
|
|
36
|
536 ngx_http_upstream_reinit(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
537 {
|
|
|
538 ngx_chain_t *cl;
|
|
|
539
|
|
58
|
540 if (u->reinit_request(r) != NGX_OK) {
|
|
|
541 return NGX_ERROR;
|
|
|
542 }
|
|
|
543
|
|
|
544 ngx_memzero(&r->upstream->headers_in,
|
|
|
545 sizeof(ngx_http_upstream_headers_in_t));
|
|
|
546
|
|
|
547 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
|
|
548 sizeof(ngx_table_elt_t)) != NGX_OK)
|
|
|
549 {
|
|
|
550 return NGX_ERROR;
|
|
28
|
551 }
|
|
|
552
|
|
|
553 /* reinit the request chain */
|
|
|
554
|
|
58
|
555 for (cl = u->request_bufs; cl; cl = cl->next) {
|
|
28
|
556 cl->buf->pos = cl->buf->start;
|
|
|
557 cl->buf->file_pos = 0;
|
|
|
558 }
|
|
|
559
|
|
58
|
560 /* reinit the subrequest's ngx_output_chain() context */
|
|
|
561
|
|
|
562 if (r->request_body) {
|
|
|
563 if (r->request_body->temp_file && r->main && u->output.buf) {
|
|
|
564
|
|
|
565 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
|
566 if (u->output.free == NULL) {
|
|
|
567 return NGX_ERROR;
|
|
|
568 }
|
|
|
569
|
|
|
570 u->output.free->buf = u->output.buf;
|
|
|
571 u->output.free->next = NULL;
|
|
|
572
|
|
|
573 u->output.buf->pos = u->output.buf->start;
|
|
|
574 u->output.buf->last = u->output.buf->start;
|
|
|
575 }
|
|
|
576 }
|
|
28
|
577
|
|
|
578 u->output.buf = NULL;
|
|
|
579 u->output.in = NULL;
|
|
|
580 u->output.busy = NULL;
|
|
|
581
|
|
|
582 /* reinit u->header_in buffer */
|
|
|
583
|
|
|
584 #if 0
|
|
|
585 if (u->cache) {
|
|
|
586 u->header_in.pos = u->header_in.start + u->cache->ctx.header_size;
|
|
|
587 u->header_in.last = u->header_in.pos;
|
|
|
588
|
|
|
589 } else {
|
|
|
590 u->header_in.pos = u->header_in.start;
|
|
|
591 u->header_in.last = u->header_in.start;
|
|
|
592 }
|
|
|
593 #else
|
|
58
|
594
|
|
28
|
595 u->header_in.pos = u->header_in.start;
|
|
|
596 u->header_in.last = u->header_in.start;
|
|
58
|
597
|
|
28
|
598 #endif
|
|
|
599
|
|
|
600 /* add one more state */
|
|
|
601
|
|
50
|
602 u->state = ngx_array_push(&u->states);
|
|
|
603 if (u->state == NULL) {
|
|
58
|
604 return NGX_ERROR;
|
|
28
|
605 }
|
|
|
606
|
|
|
607 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
|
|
58
|
608
|
|
|
609 return NGX_OK;
|
|
28
|
610 }
|
|
|
611
|
|
|
612
|
|
36
|
613 static void
|
|
|
614 ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
615 {
|
|
32
|
616 int rc;
|
|
|
617 ngx_connection_t *c;
|
|
28
|
618
|
|
|
619 c = u->peer.connection;
|
|
|
620
|
|
|
621 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
622 "http upstream send request");
|
|
|
623
|
|
|
624 #if (NGX_HAVE_KQUEUE)
|
|
|
625
|
|
|
626 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT)
|
|
|
627 && !u->request_sent
|
|
|
628 && c->write->pending_eof)
|
|
|
629 {
|
|
86
|
630 (void) ngx_connection_error(c, c->write->kq_errno,
|
|
|
631 "kevent() reported that connect() failed");
|
|
28
|
632 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
633 return;
|
|
|
634 }
|
|
|
635
|
|
|
636 #endif
|
|
|
637
|
|
32
|
638 c->log->action = "sending request to upstream";
|
|
28
|
639
|
|
58
|
640 rc = ngx_output_chain(&u->output, u->request_sent ? NULL : u->request_bufs);
|
|
28
|
641
|
|
|
642 u->request_sent = 1;
|
|
|
643
|
|
|
644 if (rc == NGX_ERROR) {
|
|
|
645 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
646 return;
|
|
|
647 }
|
|
|
648
|
|
|
649 if (c->write->timer_set) {
|
|
|
650 ngx_del_timer(c->write);
|
|
|
651 }
|
|
|
652
|
|
|
653 if (rc == NGX_AGAIN) {
|
|
|
654 ngx_add_timer(c->write, u->conf->send_timeout);
|
|
|
655
|
|
|
656 if (ngx_handle_write_event(c->write, u->conf->send_lowat) == NGX_ERROR)
|
|
|
657 {
|
|
|
658 ngx_http_upstream_finalize_request(r, u,
|
|
|
659 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
660 return;
|
|
|
661 }
|
|
|
662
|
|
|
663 return;
|
|
|
664 }
|
|
|
665
|
|
|
666 /* rc == NGX_OK */
|
|
|
667
|
|
|
668 if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) {
|
|
|
669 if (ngx_tcp_push(c->fd) == NGX_ERROR) {
|
|
|
670 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno,
|
|
|
671 ngx_tcp_push_n " failed");
|
|
|
672 ngx_http_upstream_finalize_request(r, u,
|
|
|
673 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
674 return;
|
|
|
675 }
|
|
|
676
|
|
|
677 c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
|
|
|
678 return;
|
|
|
679 }
|
|
|
680
|
|
|
681 ngx_add_timer(c->read, u->conf->read_timeout);
|
|
|
682
|
|
|
683 #if 1
|
|
|
684 if (c->read->ready) {
|
|
|
685
|
|
|
686 /* post aio operation */
|
|
|
687
|
|
|
688 /*
|
|
|
689 * TODO comment
|
|
|
690 * although we can post aio operation just in the end
|
|
|
691 * of ngx_http_upstream_connect() CHECK IT !!!
|
|
|
692 * it's better to do here because we postpone header buffer allocation
|
|
|
693 */
|
|
|
694
|
|
|
695 ngx_http_upstream_process_header(c->read);
|
|
|
696 return;
|
|
|
697 }
|
|
|
698 #endif
|
|
|
699
|
|
58
|
700 c->write->handler = ngx_http_upstream_dummy_handler;
|
|
28
|
701
|
|
58
|
702 if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
|
|
28
|
703 ngx_http_upstream_finalize_request(r, u,
|
|
|
704 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
705 return;
|
|
|
706 }
|
|
|
707 }
|
|
|
708
|
|
|
709
|
|
36
|
710 static void
|
|
|
711 ngx_http_upstream_send_request_handler(ngx_event_t *wev)
|
|
28
|
712 {
|
|
|
713 ngx_connection_t *c;
|
|
|
714 ngx_http_request_t *r;
|
|
|
715 ngx_http_upstream_t *u;
|
|
|
716
|
|
|
717 c = wev->data;
|
|
|
718 r = c->data;
|
|
|
719 u = r->upstream;
|
|
|
720
|
|
|
721 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
|
722 "http upstream send request handler");
|
|
|
723
|
|
|
724 if (wev->timedout) {
|
|
32
|
725 c->log->action = "sending request to upstream";
|
|
28
|
726 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
|
727 return;
|
|
|
728 }
|
|
|
729
|
|
|
730 ngx_http_upstream_send_request(r, u);
|
|
|
731 }
|
|
|
732
|
|
|
733
|
|
36
|
734 static void
|
|
|
735 ngx_http_upstream_process_header(ngx_event_t *rev)
|
|
28
|
736 {
|
|
64
|
737 ssize_t n;
|
|
|
738 ngx_int_t rc;
|
|
|
739 ngx_uint_t i, key;
|
|
|
740 ngx_list_part_t *part;
|
|
|
741 ngx_table_elt_t *h;
|
|
|
742 ngx_connection_t *c;
|
|
|
743 ngx_http_request_t *r;
|
|
|
744 ngx_http_upstream_t *u;
|
|
|
745 ngx_http_err_page_t *err_page;
|
|
|
746 ngx_http_core_loc_conf_t *clcf;
|
|
|
747 ngx_http_upstream_header_t *hh;
|
|
|
748 ngx_http_upstream_main_conf_t *umcf;
|
|
28
|
749
|
|
|
750 c = rev->data;
|
|
|
751 r = c->data;
|
|
|
752 u = r->upstream;
|
|
|
753
|
|
|
754 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
|
|
32
|
755 "http upstream process header");
|
|
28
|
756
|
|
32
|
757 c->log->action = "reading response header from upstream";
|
|
28
|
758
|
|
|
759 if (rev->timedout) {
|
|
|
760 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
|
761 return;
|
|
|
762 }
|
|
|
763
|
|
|
764 if (u->header_in.start == NULL) {
|
|
|
765 u->header_in.start = ngx_palloc(r->pool, u->conf->header_buffer_size);
|
|
|
766 if (u->header_in.start == NULL) {
|
|
|
767 ngx_http_upstream_finalize_request(r, u,
|
|
|
768 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
769 return;
|
|
|
770 }
|
|
|
771
|
|
|
772 u->header_in.pos = u->header_in.start;
|
|
|
773 u->header_in.last = u->header_in.start;
|
|
32
|
774 u->header_in.end = u->header_in.start + u->conf->header_buffer_size;
|
|
28
|
775 u->header_in.temporary = 1;
|
|
|
776
|
|
|
777 u->header_in.tag = u->output.tag;
|
|
|
778
|
|
58
|
779 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
|
|
780 sizeof(ngx_table_elt_t)) == NGX_ERROR)
|
|
|
781 {
|
|
|
782 ngx_http_upstream_finalize_request(r, u,
|
|
|
783 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
784 return;
|
|
|
785 }
|
|
|
786
|
|
28
|
787 #if 0
|
|
|
788 if (u->cache) {
|
|
|
789 u->header_in.pos += u->cache->ctx.header_size;
|
|
|
790 u->header_in.last = u->header_in.pos;
|
|
|
791 }
|
|
|
792 #endif
|
|
|
793 }
|
|
|
794
|
|
|
795 n = ngx_recv(u->peer.connection, u->header_in.last,
|
|
|
796 u->header_in.end - u->header_in.last);
|
|
|
797
|
|
|
798 if (n == NGX_AGAIN) {
|
|
|
799 #if 0
|
|
|
800 ngx_add_timer(rev, u->read_timeout);
|
|
|
801 #endif
|
|
|
802
|
|
|
803 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
804 ngx_http_upstream_finalize_request(r, u,
|
|
|
805 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
806 return;
|
|
|
807 }
|
|
|
808
|
|
|
809 return;
|
|
|
810 }
|
|
|
811
|
|
|
812 if (n == 0) {
|
|
|
813 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
|
814 "upstream prematurely closed connection");
|
|
|
815 }
|
|
|
816
|
|
|
817 if (n == NGX_ERROR || n == 0) {
|
|
|
818 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
819 return;
|
|
|
820 }
|
|
|
821
|
|
|
822 u->header_in.last += n;
|
|
|
823
|
|
|
824 #if 0
|
|
|
825 u->valid_header_in = 0;
|
|
|
826
|
|
|
827 u->peer.cached = 0;
|
|
|
828 #endif
|
|
|
829
|
|
|
830 rc = u->process_header(r);
|
|
|
831
|
|
|
832 if (rc == NGX_AGAIN) {
|
|
|
833 #if 0
|
|
|
834 ngx_add_timer(rev, u->read_timeout);
|
|
|
835 #endif
|
|
|
836
|
|
58
|
837 if (u->header_in.pos == u->header_in.end) {
|
|
28
|
838 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
|
839 "upstream sent too big header");
|
|
|
840
|
|
|
841 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
|
842 return;
|
|
|
843 }
|
|
|
844
|
|
|
845 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
846 ngx_http_upstream_finalize_request(r, u,
|
|
|
847 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
848 return;
|
|
|
849 }
|
|
|
850
|
|
|
851 return;
|
|
|
852 }
|
|
|
853
|
|
|
854 if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) {
|
|
|
855 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
|
856 return;
|
|
|
857 }
|
|
|
858
|
|
|
859 if (rc == NGX_ERROR || rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
|
860 ngx_http_upstream_finalize_request(r, u,
|
|
|
861 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
862 return;
|
|
|
863 }
|
|
|
864
|
|
|
865 /* rc == NGX_OK */
|
|
|
866
|
|
78
|
867 if (u->headers_in.status_n == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
58
|
868
|
|
|
869 if (u->peer.tries > 1
|
|
|
870 && (u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
|
871 {
|
|
|
872 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_500);
|
|
|
873 return;
|
|
|
874 }
|
|
|
875
|
|
|
876 #if (NGX_HTTP_CACHE)
|
|
|
877
|
|
|
878 if (u->peer.tries == 0
|
|
|
879 && u->stale
|
|
|
880 && (u->conf->use_stale & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
|
881 {
|
|
|
882 ngx_http_upstream_finalize_request(r, u,
|
|
78
|
883 ngx_http_send_cached_response(r));
|
|
58
|
884 return;
|
|
|
885 }
|
|
|
886
|
|
|
887 #endif
|
|
|
888 }
|
|
|
889
|
|
78
|
890 if (u->headers_in.status_n == NGX_HTTP_NOT_FOUND
|
|
58
|
891 && u->peer.tries > 1
|
|
|
892 && u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_404)
|
|
|
893 {
|
|
|
894 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_404);
|
|
|
895 return;
|
|
|
896 }
|
|
|
897
|
|
|
898
|
|
78
|
899 if (u->headers_in.status_n >= NGX_HTTP_BAD_REQUEST
|
|
36
|
900 && u->conf->redirect_errors
|
|
|
901 && r->err_ctx == NULL)
|
|
|
902 {
|
|
|
903 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
904
|
|
|
905 if (clcf->error_pages) {
|
|
|
906
|
|
|
907 err_page = clcf->error_pages->elts;
|
|
|
908 for (i = 0; i < clcf->error_pages->nelts; i++) {
|
|
78
|
909 if (err_page[i].status == (ngx_int_t) u->headers_in.status_n) {
|
|
|
910
|
|
|
911 if (u->headers_in.status_n == NGX_HTTP_UNAUTHORIZED) {
|
|
|
912
|
|
|
913 r->headers_out.www_authenticate =
|
|
|
914 ngx_list_push(&r->headers_out.headers);
|
|
|
915
|
|
|
916 if (r->headers_out.www_authenticate == NULL) {
|
|
|
917 ngx_http_upstream_finalize_request(r, u,
|
|
|
918 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
919 return;
|
|
|
920 }
|
|
|
921
|
|
|
922 *r->headers_out.www_authenticate =
|
|
|
923 *u->headers_in.www_authenticate;
|
|
|
924 }
|
|
|
925
|
|
36
|
926 ngx_http_upstream_finalize_request(r, u,
|
|
78
|
927 u->headers_in.status_n);
|
|
36
|
928 return;
|
|
|
929 }
|
|
|
930 }
|
|
|
931 }
|
|
|
932 }
|
|
|
933
|
|
64
|
934 if (r->upstream->headers_in.x_accel_redirect) {
|
|
|
935 ngx_http_upstream_finalize_request(r, u, NGX_DECLINED);
|
|
|
936
|
|
|
937 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
|
938 hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
|
|
|
939
|
|
|
940 part = &r->upstream->headers_in.headers.part;
|
|
|
941 h = part->elts;
|
|
|
942
|
|
|
943 for (i = 0; /* void */; i++) {
|
|
|
944
|
|
|
945 if (i >= part->nelts) {
|
|
|
946 if (part->next == NULL) {
|
|
|
947 break;
|
|
|
948 }
|
|
|
949
|
|
|
950 part = part->next;
|
|
|
951 h = part->elts;
|
|
|
952 i = 0;
|
|
|
953 }
|
|
|
954
|
|
|
955 key = h[i].hash % umcf->headers_in_hash.hash_size;
|
|
|
956
|
|
|
957 if (hh[key].redirect
|
|
|
958 && hh[key].name.len == h[i].key.len
|
|
|
959 && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0)
|
|
|
960 {
|
|
|
961 if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) {
|
|
|
962 ngx_http_upstream_finalize_request(r, u,
|
|
|
963 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
964 return;
|
|
|
965 }
|
|
|
966
|
|
|
967 }
|
|
|
968 }
|
|
|
969
|
|
|
970 ngx_http_internal_redirect(r,
|
|
|
971 &r->upstream->headers_in.x_accel_redirect->value,
|
|
|
972 NULL);
|
|
|
973 return;
|
|
|
974 }
|
|
|
975
|
|
28
|
976 ngx_http_upstream_send_response(r, u);
|
|
|
977 }
|
|
|
978
|
|
|
979
|
|
36
|
980 static void
|
|
|
981 ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
982 {
|
|
58
|
983 ngx_int_t rc;
|
|
|
984 ngx_uint_t i, key;
|
|
|
985 ngx_list_part_t *part;
|
|
|
986 ngx_table_elt_t *h;
|
|
|
987 ngx_event_pipe_t *p;
|
|
|
988 ngx_http_core_loc_conf_t *clcf;
|
|
|
989 ngx_http_upstream_header_t *hh;
|
|
|
990 ngx_http_upstream_main_conf_t *umcf;
|
|
|
991
|
|
|
992 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
|
993 hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
|
|
|
994
|
|
|
995 part = &r->upstream->headers_in.headers.part;
|
|
|
996 h = part->elts;
|
|
|
997
|
|
|
998 for (i = 0; /* void */; i++) {
|
|
28
|
999
|
|
58
|
1000 if (i >= part->nelts) {
|
|
|
1001 if (part->next == NULL) {
|
|
|
1002 break;
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 part = part->next;
|
|
|
1006 h = part->elts;
|
|
|
1007 i = 0;
|
|
|
1008 }
|
|
|
1009
|
|
|
1010 key = h[i].hash % umcf->headers_in_hash.hash_size;
|
|
|
1011
|
|
|
1012 if (hh[key].name.len == h[i].key.len
|
|
|
1013 && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0)
|
|
|
1014 {
|
|
|
1015 if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) {
|
|
|
1016 ngx_http_upstream_finalize_request(r, u,
|
|
|
1017 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
1018 return;
|
|
|
1019 }
|
|
|
1020
|
|
|
1021 continue;
|
|
|
1022 }
|
|
|
1023
|
|
|
1024 if (ngx_http_upstream_copy_header_line(r, &h[i], 0) != NGX_OK) {
|
|
|
1025 ngx_http_upstream_finalize_request(r, u,
|
|
|
1026 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
1027 return;
|
|
|
1028 }
|
|
|
1029 }
|
|
|
1030
|
|
78
|
1031 r->headers_out.status = u->headers_in.status_n;
|
|
|
1032 r->headers_out.status_line = u->headers_in.status_line;
|
|
|
1033
|
|
58
|
1034 rc = ngx_http_send_header(r);
|
|
28
|
1035
|
|
34
|
1036 if (rc == NGX_ERROR || rc > NGX_OK) {
|
|
|
1037 ngx_http_upstream_finalize_request(r, u, rc);
|
|
28
|
1038 return;
|
|
|
1039 }
|
|
|
1040
|
|
|
1041 u->header_sent = 1;
|
|
|
1042
|
|
|
1043 /* TODO: preallocate event_pipe bufs, look "Content-Length" */
|
|
|
1044
|
|
|
1045 #if 0
|
|
|
1046
|
|
|
1047 if (u->cache && u->cache->ctx.file.fd != NGX_INVALID_FILE) {
|
|
|
1048 if (ngx_close_file(u->cache->ctx.file.fd) == NGX_FILE_ERROR) {
|
|
|
1049 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
|
|
|
1050 ngx_close_file_n " \"%s\" failed",
|
|
|
1051 u->cache->ctx.file.name.data);
|
|
|
1052 }
|
|
|
1053 }
|
|
|
1054
|
|
|
1055 if (u->cachable) {
|
|
|
1056 header = (ngx_http_cache_header_t *) u->header_in->start;
|
|
|
1057
|
|
|
1058 header->expires = u->cache->ctx.expires;
|
|
|
1059 header->last_modified = u->cache->ctx.last_modified;
|
|
|
1060 header->date = u->cache->ctx.date;
|
|
|
1061 header->length = r->headers_out.content_length_n;
|
|
|
1062 u->cache->ctx.length = r->headers_out.content_length_n;
|
|
|
1063
|
|
|
1064 header->key_len = u->cache->ctx.key0.len;
|
|
|
1065 ngx_memcpy(&header->key, u->cache->ctx.key0.data, header->key_len);
|
|
|
1066 header->key[header->key_len] = LF;
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 #endif
|
|
|
1070
|
|
|
1071 p = &u->pipe;
|
|
|
1072
|
|
|
1073 p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter;
|
|
|
1074 p->output_ctx = r;
|
|
|
1075 p->tag = u->output.tag;
|
|
|
1076 p->bufs = u->conf->bufs;
|
|
|
1077 p->busy_size = u->conf->busy_buffers_size;
|
|
|
1078 p->upstream = u->peer.connection;
|
|
|
1079 p->downstream = r->connection;
|
|
|
1080 p->pool = r->pool;
|
|
|
1081 p->log = r->connection->log;
|
|
|
1082
|
|
|
1083 p->cachable = u->cachable;
|
|
|
1084
|
|
50
|
1085 p->temp_file = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
|
|
|
1086 if (p->temp_file == NULL) {
|
|
28
|
1087 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1088 return;
|
|
|
1089 }
|
|
|
1090
|
|
|
1091 p->temp_file->file.fd = NGX_INVALID_FILE;
|
|
|
1092 p->temp_file->file.log = r->connection->log;
|
|
|
1093 p->temp_file->path = u->conf->temp_path;
|
|
|
1094 p->temp_file->pool = r->pool;
|
|
|
1095
|
|
|
1096 if (u->cachable) {
|
|
|
1097 p->temp_file->persistent = 1;
|
|
|
1098 } else {
|
|
|
1099 p->temp_file->warn = "an upstream response is buffered "
|
|
|
1100 "to a temporary file";
|
|
|
1101 }
|
|
|
1102
|
|
|
1103 p->max_temp_file_size = u->conf->max_temp_file_size;
|
|
|
1104 p->temp_file_write_size = u->conf->temp_file_write_size;
|
|
|
1105
|
|
50
|
1106 p->preread_bufs = ngx_alloc_chain_link(r->pool);
|
|
|
1107 if (p->preread_bufs == NULL) {
|
|
28
|
1108 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1109 return;
|
|
|
1110 }
|
|
|
1111 p->preread_bufs->buf = &u->header_in;
|
|
|
1112 p->preread_bufs->next = NULL;
|
|
|
1113 u->header_in.recycled = 1;
|
|
|
1114
|
|
|
1115 p->preread_size = u->header_in.last - u->header_in.pos;
|
|
|
1116
|
|
|
1117 if (u->cachable) {
|
|
|
1118 p->buf_to_file = ngx_calloc_buf(r->pool);
|
|
|
1119 if (p->buf_to_file == NULL) {
|
|
|
1120 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1121 return;
|
|
|
1122 }
|
|
|
1123 p->buf_to_file->pos = u->header_in.start;
|
|
|
1124 p->buf_to_file->last = u->header_in.pos;
|
|
|
1125 p->buf_to_file->temporary = 1;
|
|
|
1126 }
|
|
|
1127
|
|
|
1128 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
|
|
|
1129 /* the posted aio operation may currupt a shadow buffer */
|
|
|
1130 p->single_buf = 1;
|
|
|
1131 }
|
|
|
1132
|
|
|
1133 /* TODO: p->free_bufs = 0 if use ngx_create_chain_of_bufs() */
|
|
|
1134 p->free_bufs = 1;
|
|
|
1135
|
|
|
1136 /*
|
|
|
1137 * event_pipe would do u->header_in.last += p->preread_size
|
|
|
1138 * as though these bytes were read
|
|
|
1139 */
|
|
|
1140 u->header_in.last = u->header_in.pos;
|
|
|
1141
|
|
|
1142 if (u->conf->cyclic_temp_file) {
|
|
|
1143
|
|
|
1144 /*
|
|
|
1145 * we need to disable the use of sendfile() if we use cyclic temp file
|
|
|
1146 * because the writing a new data may interfere with sendfile()
|
|
|
1147 * that uses the same kernel file pages (at least on FreeBSD)
|
|
|
1148 */
|
|
|
1149
|
|
|
1150 p->cyclic_temp_file = 1;
|
|
|
1151 r->connection->sendfile = 0;
|
|
|
1152
|
|
|
1153 } else {
|
|
|
1154 p->cyclic_temp_file = 0;
|
|
|
1155 }
|
|
|
1156
|
|
|
1157 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
1158
|
|
|
1159 p->read_timeout = u->conf->read_timeout;
|
|
|
1160 p->send_timeout = clcf->send_timeout;
|
|
|
1161 p->send_lowat = clcf->send_lowat;
|
|
|
1162
|
|
58
|
1163 u->peer.connection->read->handler = ngx_http_upstream_process_body;
|
|
|
1164 r->write_event_handler = ngx_http_upstream_process_downstream;
|
|
28
|
1165
|
|
|
1166 ngx_http_upstream_process_body(u->peer.connection->read);
|
|
|
1167 }
|
|
|
1168
|
|
|
1169
|
|
36
|
1170 static void
|
|
58
|
1171 ngx_http_upstream_process_downstream(ngx_http_request_t *r)
|
|
|
1172 {
|
|
|
1173 ngx_http_upstream_process_body(r->connection->write);
|
|
|
1174 }
|
|
|
1175
|
|
|
1176
|
|
|
1177 static void
|
|
36
|
1178 ngx_http_upstream_process_body(ngx_event_t *ev)
|
|
28
|
1179 {
|
|
58
|
1180 ngx_event_pipe_t *p;
|
|
28
|
1181 ngx_connection_t *c;
|
|
|
1182 ngx_http_request_t *r;
|
|
|
1183 ngx_http_upstream_t *u;
|
|
|
1184
|
|
|
1185 c = ev->data;
|
|
|
1186 r = c->data;
|
|
|
1187 u = r->upstream;
|
|
|
1188
|
|
|
1189 if (ev->write) {
|
|
32
|
1190 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1191 "http upstream process downstream");
|
|
|
1192 c->log->action = "sending to client";
|
|
28
|
1193
|
|
|
1194 } else {
|
|
32
|
1195 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1196 "http upstream process upstream");
|
|
|
1197 c->log->action = "reading upstream";
|
|
28
|
1198 }
|
|
|
1199
|
|
|
1200 p = &u->pipe;
|
|
|
1201
|
|
|
1202 if (ev->timedout) {
|
|
|
1203 if (ev->write) {
|
|
76
|
1204 if (ev->delayed) {
|
|
|
1205
|
|
|
1206 ev->timedout = 0;
|
|
|
1207 ev->delayed = 0;
|
|
|
1208
|
|
|
1209 if (!ev->ready) {
|
|
|
1210 ngx_add_timer(ev, p->send_timeout);
|
|
|
1211
|
|
|
1212 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR)
|
|
|
1213 {
|
|
|
1214 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1215 return;
|
|
|
1216 }
|
|
|
1217
|
|
|
1218 return;
|
|
|
1219 }
|
|
|
1220
|
|
|
1221 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
|
|
1222 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1223 return;
|
|
|
1224 }
|
|
|
1225
|
|
|
1226 } else {
|
|
|
1227 p->downstream_error = 1;
|
|
|
1228 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
|
1229 "client timed out");
|
|
|
1230 }
|
|
28
|
1231
|
|
|
1232 } else {
|
|
|
1233 p->upstream_error = 1;
|
|
|
1234 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
|
1235 "upstream timed out");
|
|
|
1236 }
|
|
|
1237
|
|
|
1238 } else {
|
|
76
|
1239 if (ev->write && ev->delayed) {
|
|
|
1240 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1241 "http downstream delayed");
|
|
|
1242
|
|
|
1243 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR) {
|
|
|
1244 return;
|
|
|
1245 }
|
|
|
1246
|
|
|
1247 return;
|
|
|
1248 }
|
|
|
1249
|
|
28
|
1250 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
|
|
1251 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1252 return;
|
|
|
1253 }
|
|
|
1254 }
|
|
|
1255
|
|
|
1256 if (u->peer.connection) {
|
|
|
1257
|
|
|
1258 #if (NGX_HTTP_FILE_CACHE)
|
|
|
1259
|
|
|
1260 if (p->upstream_done && u->cachable) {
|
|
|
1261 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
|
1262 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1263 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1264 return;
|
|
|
1265 }
|
|
|
1266
|
|
|
1267 } else if (p->upstream_eof && u->cachable) {
|
|
|
1268
|
|
|
1269 /* TODO: check length & update cache */
|
|
|
1270
|
|
|
1271 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
|
1272 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1273 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1274 return;
|
|
|
1275 }
|
|
|
1276 }
|
|
|
1277
|
|
|
1278 #endif
|
|
|
1279
|
|
|
1280 if (p->upstream_done || p->upstream_eof || p->upstream_error) {
|
|
32
|
1281 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1282 "http upstream exit: %p", p->out);
|
|
28
|
1283 #if 0
|
|
|
1284 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1285 #endif
|
|
|
1286 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1287 return;
|
|
|
1288 }
|
|
|
1289 }
|
|
|
1290
|
|
|
1291 if (p->downstream_error) {
|
|
32
|
1292 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1293 "http upstream downstream error");
|
|
28
|
1294
|
|
|
1295 if (!u->cachable && u->peer.connection) {
|
|
|
1296 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1297 }
|
|
|
1298 }
|
|
|
1299 }
|
|
|
1300
|
|
|
1301
|
|
36
|
1302 static void
|
|
|
1303 ngx_http_upstream_dummy_handler(ngx_event_t *wev)
|
|
28
|
1304 {
|
|
|
1305 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
|
1306 "http upstream dummy handler");
|
|
|
1307 }
|
|
|
1308
|
|
|
1309
|
|
36
|
1310 static void
|
|
|
1311 ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
|
|
|
1312 ngx_uint_t ft_type)
|
|
28
|
1313 {
|
|
74
|
1314 ngx_uint_t status, down;
|
|
28
|
1315
|
|
|
1316 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1317 "http next upstream, %xD", ft_type);
|
|
|
1318
|
|
|
1319 #if 0
|
|
|
1320 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1321 #endif
|
|
|
1322
|
|
74
|
1323 if (ft_type == NGX_HTTP_UPSTREAM_FT_HTTP_404) {
|
|
|
1324 down = 0;
|
|
|
1325 } else {
|
|
|
1326 down = 1;
|
|
28
|
1327 }
|
|
74
|
1328
|
|
|
1329 ngx_event_connect_peer_failed(&u->peer, down);
|
|
|
1330
|
|
28
|
1331 if (ft_type == NGX_HTTP_UPSTREAM_FT_TIMEOUT) {
|
|
|
1332 ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_ETIMEDOUT,
|
|
|
1333 "upstream timed out");
|
|
|
1334 }
|
|
|
1335
|
|
|
1336 if (u->peer.cached && ft_type == NGX_HTTP_UPSTREAM_FT_ERROR) {
|
|
|
1337 status = 0;
|
|
|
1338
|
|
|
1339 } else {
|
|
|
1340 switch(ft_type) {
|
|
|
1341
|
|
|
1342 case NGX_HTTP_UPSTREAM_FT_TIMEOUT:
|
|
|
1343 status = NGX_HTTP_GATEWAY_TIME_OUT;
|
|
|
1344 break;
|
|
|
1345
|
|
|
1346 case NGX_HTTP_UPSTREAM_FT_HTTP_500:
|
|
|
1347 status = NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
1348 break;
|
|
|
1349
|
|
|
1350 case NGX_HTTP_UPSTREAM_FT_HTTP_404:
|
|
|
1351 status = NGX_HTTP_NOT_FOUND;
|
|
|
1352 break;
|
|
|
1353
|
|
|
1354 /*
|
|
|
1355 * NGX_HTTP_UPSTREAM_FT_BUSY_LOCK and NGX_HTTP_UPSTREAM_FT_MAX_WAITING
|
|
|
1356 * never reach here
|
|
|
1357 */
|
|
|
1358
|
|
|
1359 default:
|
|
|
1360 status = NGX_HTTP_BAD_GATEWAY;
|
|
|
1361 }
|
|
|
1362 }
|
|
|
1363
|
|
|
1364 if (r->connection->write->eof) {
|
|
76
|
1365 r->connection->closed = 1;
|
|
28
|
1366 ngx_http_upstream_finalize_request(r, u,
|
|
|
1367 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
1368 return;
|
|
|
1369 }
|
|
|
1370
|
|
|
1371 if (status) {
|
|
|
1372 u->state->status = status;
|
|
|
1373
|
|
74
|
1374 if (u->peer.tries == 0 || !(u->conf->next_upstream & ft_type)) {
|
|
28
|
1375
|
|
|
1376 #if (NGX_HTTP_CACHE)
|
|
|
1377
|
|
|
1378 if (u->stale && (u->conf->use_stale & ft_type)) {
|
|
|
1379 ngx_http_upstream_finalize_request(r, u,
|
|
74
|
1380 ngx_http_send_cached_response(r));
|
|
28
|
1381 return;
|
|
|
1382 }
|
|
|
1383
|
|
|
1384 #endif
|
|
|
1385
|
|
|
1386 ngx_http_upstream_finalize_request(r, u, status);
|
|
|
1387 return;
|
|
|
1388 }
|
|
|
1389 }
|
|
|
1390
|
|
|
1391 if (u->peer.connection) {
|
|
|
1392 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1393 "close http upstream connection: %d",
|
|
|
1394 u->peer.connection->fd);
|
|
|
1395
|
|
|
1396 ngx_close_connection(u->peer.connection);
|
|
|
1397 }
|
|
|
1398
|
|
|
1399 #if 0
|
|
|
1400 if (u->conf->busy_lock && !u->busy_locked) {
|
|
|
1401 ngx_http_upstream_busy_lock(p);
|
|
|
1402 return;
|
|
|
1403 }
|
|
|
1404 #endif
|
|
|
1405
|
|
|
1406 ngx_http_upstream_connect(r, u);
|
|
|
1407 }
|
|
|
1408
|
|
|
1409
|
|
36
|
1410 static void
|
|
|
1411 ngx_http_upstream_finalize_request(ngx_http_request_t *r,
|
|
|
1412 ngx_http_upstream_t *u, ngx_int_t rc)
|
|
28
|
1413 {
|
|
32
|
1414 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1415 "finalize http upstream request: %i", rc);
|
|
28
|
1416
|
|
|
1417 u->finalize_request(r, rc);
|
|
|
1418
|
|
|
1419 if (u->peer.connection) {
|
|
|
1420 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1421 "close http upstream connection: %d",
|
|
|
1422 u->peer.connection->fd);
|
|
|
1423
|
|
|
1424 ngx_close_connection(u->peer.connection);
|
|
|
1425 }
|
|
|
1426
|
|
32
|
1427 u->peer.connection = NULL;
|
|
|
1428
|
|
28
|
1429 if (u->header_sent
|
|
|
1430 && (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE))
|
|
|
1431 {
|
|
|
1432 rc = 0;
|
|
|
1433 }
|
|
|
1434
|
|
30
|
1435 if (u->pipe.temp_file) {
|
|
28
|
1436 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1437 "http upstream temp fd: %d",
|
|
|
1438 u->pipe.temp_file->file.fd);
|
|
|
1439 }
|
|
|
1440
|
|
|
1441 #if 0
|
|
|
1442 if (u->cache) {
|
|
|
1443 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
32
|
1444 "http upstream cache fd: %d",
|
|
28
|
1445 u->cache->ctx.file.fd);
|
|
|
1446 }
|
|
|
1447 #endif
|
|
|
1448
|
|
58
|
1449 r->log_handler = u->saved_log_handler;
|
|
64
|
1450
|
|
|
1451 if (rc == NGX_DECLINED) {
|
|
|
1452 return;
|
|
|
1453 }
|
|
|
1454
|
|
32
|
1455 r->connection->log->action = "sending to client";
|
|
|
1456
|
|
28
|
1457 if (rc == 0 && r->main == NULL) {
|
|
|
1458 rc = ngx_http_send_last(r);
|
|
|
1459 }
|
|
|
1460
|
|
|
1461 ngx_http_finalize_request(r, rc);
|
|
|
1462 }
|
|
|
1463
|
|
|
1464
|
|
58
|
1465 static ngx_int_t
|
|
|
1466 ngx_http_upstream_process_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1467 ngx_uint_t offset)
|
|
|
1468 {
|
|
|
1469 ngx_table_elt_t **ph;
|
|
|
1470
|
|
|
1471 ph = (ngx_table_elt_t **) ((char *) &r->upstream->headers_in + offset);
|
|
|
1472
|
|
|
1473 if (*ph == NULL) {
|
|
|
1474 *ph = h;
|
|
|
1475 }
|
|
|
1476
|
|
|
1477 return NGX_OK;
|
|
|
1478 }
|
|
|
1479
|
|
|
1480
|
|
|
1481 static ngx_int_t
|
|
|
1482 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
|
|
|
1483 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1484 {
|
|
|
1485 ngx_array_t *pa;
|
|
|
1486 ngx_table_elt_t **ph;
|
|
|
1487
|
|
|
1488 pa = (ngx_array_t *) ((char *) &r->upstream->headers_in + offset);
|
|
|
1489
|
|
|
1490 if (pa->elts == NULL) {
|
|
|
1491 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
|
1492 {
|
|
|
1493 return NGX_ERROR;
|
|
|
1494 }
|
|
|
1495 }
|
|
|
1496
|
|
|
1497 ph = ngx_array_push(pa);
|
|
|
1498 if (ph == NULL) {
|
|
|
1499 return NGX_ERROR;
|
|
|
1500 }
|
|
|
1501
|
|
|
1502 *ph = h;
|
|
|
1503
|
|
|
1504 return NGX_OK;
|
|
|
1505 }
|
|
|
1506
|
|
|
1507
|
|
|
1508 static ngx_int_t
|
|
|
1509 ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1510 ngx_uint_t offset)
|
|
|
1511 {
|
|
|
1512 return NGX_OK;
|
|
|
1513 }
|
|
|
1514
|
|
|
1515
|
|
|
1516 static ngx_int_t
|
|
76
|
1517 ngx_http_upstream_process_limit_rate(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1518 ngx_uint_t offset)
|
|
|
1519 {
|
|
|
1520 ngx_int_t n;
|
|
|
1521
|
|
|
1522 r->upstream->headers_in.x_accel_limit_rate = h;
|
|
|
1523
|
|
|
1524 n = ngx_atoi(h->value.data, h->value.len);
|
|
|
1525
|
|
|
1526 if (n != NGX_ERROR) {
|
|
|
1527 r->limit_rate = (size_t) n;
|
|
|
1528 }
|
|
|
1529
|
|
|
1530 return NGX_OK;
|
|
|
1531 }
|
|
|
1532
|
|
|
1533
|
|
|
1534 static ngx_int_t
|
|
58
|
1535 ngx_http_upstream_copy_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1536 ngx_uint_t offset)
|
|
|
1537 {
|
|
|
1538 ngx_table_elt_t *ho;
|
|
|
1539
|
|
|
1540 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1541 if (ho == NULL) {
|
|
|
1542 return NGX_ERROR;
|
|
|
1543 }
|
|
|
1544
|
|
|
1545 *ho = *h;
|
|
|
1546
|
|
|
1547 return NGX_OK;
|
|
|
1548 }
|
|
|
1549
|
|
|
1550
|
|
|
1551 static ngx_int_t
|
|
|
1552 ngx_http_upstream_conditional_copy_header_line(ngx_http_request_t *r,
|
|
|
1553 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1554 {
|
|
|
1555 ngx_flag_t *f;
|
|
|
1556 ngx_table_elt_t *ho;
|
|
|
1557
|
|
|
1558 f = (ngx_flag_t *) ((char *) r->upstream->conf + offset);
|
|
|
1559
|
|
|
1560 if (*f == 0) {
|
|
|
1561 return NGX_OK;
|
|
|
1562 }
|
|
|
1563
|
|
|
1564 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1565 if (ho == NULL) {
|
|
|
1566 return NGX_ERROR;
|
|
|
1567 }
|
|
|
1568
|
|
|
1569 *ho = *h;
|
|
|
1570
|
|
|
1571 return NGX_OK;
|
|
|
1572 }
|
|
|
1573
|
|
|
1574
|
|
|
1575 static ngx_int_t
|
|
|
1576 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
|
|
|
1577 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1578 {
|
|
|
1579 ngx_array_t *pa;
|
|
|
1580 ngx_table_elt_t *ho, **ph;
|
|
|
1581
|
|
|
1582 pa = (ngx_array_t *) ((char *) &r->headers_out + offset);
|
|
|
1583
|
|
|
1584 if (pa->elts == NULL) {
|
|
|
1585 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
|
1586 {
|
|
|
1587 return NGX_ERROR;
|
|
|
1588 }
|
|
|
1589 }
|
|
|
1590
|
|
|
1591 ph = ngx_array_push(pa);
|
|
|
1592 if (ph == NULL) {
|
|
|
1593 return NGX_ERROR;
|
|
|
1594 }
|
|
|
1595
|
|
|
1596 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1597 if (ho == NULL) {
|
|
|
1598 return NGX_ERROR;
|
|
|
1599 }
|
|
|
1600
|
|
|
1601 *ho = *h;
|
|
|
1602 *ph = ho;
|
|
|
1603
|
|
|
1604 return NGX_OK;
|
|
|
1605 }
|
|
|
1606
|
|
|
1607
|
|
|
1608 static ngx_int_t
|
|
|
1609 ngx_http_upstream_copy_content_type(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1610 ngx_uint_t offset)
|
|
|
1611 {
|
|
|
1612 r->headers_out.content_type = h->value;
|
|
|
1613
|
|
|
1614 return NGX_OK;
|
|
|
1615 }
|
|
|
1616
|
|
|
1617
|
|
|
1618 static ngx_int_t
|
|
|
1619 ngx_http_upstream_copy_content_length(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1620 ngx_uint_t offset)
|
|
|
1621 {
|
|
|
1622 ngx_table_elt_t *ho;
|
|
|
1623
|
|
|
1624 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1625 if (ho == NULL) {
|
|
|
1626 return NGX_ERROR;
|
|
|
1627 }
|
|
|
1628
|
|
|
1629 *ho = *h;
|
|
|
1630
|
|
|
1631 r->headers_out.content_length = ho;
|
|
|
1632 r->headers_out.content_length_n = ngx_atoof(h->value.data, h->value.len);
|
|
|
1633
|
|
|
1634 return NGX_OK;
|
|
|
1635 }
|
|
|
1636
|
|
|
1637
|
|
|
1638 static ngx_int_t
|
|
|
1639 ngx_http_upstream_rewrite_location(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1640 ngx_uint_t offset)
|
|
|
1641 {
|
|
|
1642 ngx_int_t rc;
|
|
|
1643 ngx_table_elt_t *ho;
|
|
|
1644
|
|
|
1645 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1646 if (ho == NULL) {
|
|
|
1647 return NGX_ERROR;
|
|
|
1648 }
|
|
|
1649
|
|
|
1650 *ho = *h;
|
|
|
1651
|
|
|
1652 if (r->upstream->rewrite_redirect) {
|
|
|
1653 rc = r->upstream->rewrite_redirect(r, ho, 0);
|
|
|
1654
|
|
78
|
1655 if (rc == NGX_DECLINED) {
|
|
|
1656 return NGX_OK;
|
|
|
1657 }
|
|
|
1658
|
|
58
|
1659 if (rc == NGX_OK) {
|
|
|
1660 r->headers_out.location = ho;
|
|
|
1661
|
|
|
1662 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1663 "rewritten location: \"%V\"", &ho->value);
|
|
|
1664 }
|
|
|
1665
|
|
|
1666 return rc;
|
|
|
1667 }
|
|
|
1668
|
|
|
1669 /*
|
|
|
1670 * we do not set r->headers_out.location here to avoid the handling
|
|
|
1671 * the local redirects without a host name by ngx_http_header_filter()
|
|
|
1672 */
|
|
|
1673
|
|
|
1674 return NGX_OK;
|
|
|
1675 }
|
|
|
1676
|
|
|
1677
|
|
|
1678 static ngx_int_t
|
|
|
1679 ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1680 ngx_uint_t offset)
|
|
|
1681 {
|
|
|
1682 u_char *p;
|
|
|
1683 ngx_int_t rc;
|
|
|
1684 ngx_table_elt_t *ho;
|
|
|
1685
|
|
|
1686 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1687 if (ho == NULL) {
|
|
|
1688 return NGX_ERROR;
|
|
|
1689 }
|
|
|
1690
|
|
|
1691 *ho = *h;
|
|
|
1692
|
|
|
1693 if (r->upstream->rewrite_redirect) {
|
|
|
1694
|
|
|
1695 p = (u_char *) ngx_strstr(ho->value.data, "url=");
|
|
|
1696
|
|
|
1697 if (p) {
|
|
|
1698 rc = r->upstream->rewrite_redirect(r, ho, p + 4 - ho->value.data);
|
|
|
1699
|
|
|
1700 } else {
|
|
|
1701 return NGX_OK;
|
|
|
1702 }
|
|
|
1703
|
|
78
|
1704 if (rc == NGX_DECLINED) {
|
|
|
1705 return NGX_OK;
|
|
|
1706 }
|
|
|
1707
|
|
58
|
1708 #if (NGX_DEBUG)
|
|
|
1709 if (rc == NGX_OK) {
|
|
|
1710 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1711 "rewritten refresh: \"%V\"", &ho->value);
|
|
|
1712 }
|
|
|
1713 #endif
|
|
|
1714
|
|
|
1715 return rc;
|
|
|
1716 }
|
|
|
1717
|
|
|
1718 return NGX_OK;
|
|
|
1719 }
|
|
|
1720
|
|
|
1721
|
|
|
1722 #if (NGX_HTTP_GZIP)
|
|
|
1723
|
|
|
1724 static ngx_int_t
|
|
|
1725 ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
|
|
|
1726 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1727 {
|
|
|
1728 ngx_table_elt_t *ho;
|
|
|
1729
|
|
|
1730 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1731 if (ho == NULL) {
|
|
|
1732 return NGX_ERROR;
|
|
|
1733 }
|
|
|
1734
|
|
|
1735 *ho = *h;
|
|
|
1736
|
|
|
1737 r->headers_out.content_encoding = ho;
|
|
|
1738
|
|
|
1739 return NGX_OK;
|
|
|
1740 }
|
|
|
1741
|
|
|
1742 #endif
|
|
|
1743
|
|
|
1744
|
|
36
|
1745 static size_t
|
|
|
1746 ngx_http_upstream_log_status_getlen(ngx_http_request_t *r, uintptr_t data)
|
|
28
|
1747 {
|
|
|
1748 if (r->upstream) {
|
|
|
1749 return r->upstream->states.nelts * (3 + 2);
|
|
|
1750 }
|
|
|
1751
|
|
|
1752 return 1;
|
|
|
1753 }
|
|
|
1754
|
|
|
1755
|
|
36
|
1756 static u_char *
|
|
|
1757 ngx_http_upstream_log_status(ngx_http_request_t *r, u_char *buf,
|
|
|
1758 ngx_http_log_op_t *op)
|
|
28
|
1759 {
|
|
|
1760 ngx_uint_t i;
|
|
|
1761 ngx_http_upstream_t *u;
|
|
|
1762 ngx_http_upstream_state_t *state;
|
|
|
1763
|
|
|
1764 u = r->upstream;
|
|
|
1765
|
|
|
1766 if (u == NULL) {
|
|
|
1767 *buf = '-';
|
|
|
1768 return buf + 1;
|
|
|
1769 }
|
|
|
1770
|
|
|
1771 i = 0;
|
|
|
1772 state = u->states.elts;
|
|
|
1773
|
|
|
1774 for ( ;; ) {
|
|
|
1775 if (state[i].status == 0) {
|
|
|
1776 *buf++ = '-';
|
|
|
1777
|
|
|
1778 } else {
|
|
|
1779 buf = ngx_sprintf(buf, "%ui", state[i].status);
|
|
|
1780 }
|
|
|
1781
|
|
|
1782 if (++i == u->states.nelts) {
|
|
|
1783 return buf;
|
|
|
1784 }
|
|
|
1785
|
|
|
1786 *buf++ = ',';
|
|
|
1787 *buf++ = ' ';
|
|
|
1788 }
|
|
|
1789 }
|
|
|
1790
|
|
|
1791
|
|
58
|
1792 static u_char *
|
|
|
1793 ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf, size_t len)
|
|
28
|
1794 {
|
|
|
1795 u_char *p;
|
|
86
|
1796 ngx_str_t line;
|
|
56
|
1797 uintptr_t escape;
|
|
28
|
1798 ngx_http_upstream_t *u;
|
|
|
1799 ngx_peer_connection_t *peer;
|
|
|
1800
|
|
|
1801 u = r->upstream;
|
|
|
1802 peer = &u->peer;
|
|
|
1803
|
|
|
1804 p = ngx_snprintf(buf, len,
|
|
58
|
1805 ", server: %V, URL: \"%V\","
|
|
52
|
1806 " upstream: %V%V%s%V",
|
|
|
1807 &r->server_name,
|
|
28
|
1808 &r->unparsed_uri,
|
|
58
|
1809 &u->conf->schema,
|
|
28
|
1810 &peer->peers->peer[peer->cur_peer].name,
|
|
|
1811 peer->peers->peer[peer->cur_peer].uri_separator,
|
|
58
|
1812 &u->conf->uri);
|
|
28
|
1813 len -= p - buf;
|
|
|
1814 buf = p;
|
|
|
1815
|
|
|
1816 if (r->quoted_uri) {
|
|
58
|
1817 escape = 2 * ngx_escape_uri(NULL, r->uri.data + u->conf->location->len,
|
|
|
1818 r->uri.len - u->conf->location->len,
|
|
28
|
1819 NGX_ESCAPE_URI);
|
|
|
1820 } else {
|
|
|
1821 escape = 0;
|
|
|
1822 }
|
|
|
1823
|
|
|
1824 if (escape) {
|
|
58
|
1825 if (len >= r->uri.len - u->conf->location->len + escape) {
|
|
28
|
1826
|
|
58
|
1827 ngx_escape_uri(buf, r->uri.data + u->conf->location->len,
|
|
|
1828 r->uri.len - u->conf->location->len, NGX_ESCAPE_URI);
|
|
28
|
1829
|
|
58
|
1830 buf += r->uri.len - u->conf->location->len + escape;
|
|
|
1831 len -= r->uri.len - u->conf->location->len + escape;
|
|
28
|
1832
|
|
86
|
1833 } else {
|
|
|
1834 p = ngx_palloc(r->pool,
|
|
|
1835 r->uri.len - u->conf->location->len + escape);
|
|
|
1836 if (p == NULL) {
|
|
|
1837 return buf;
|
|
28
|
1838 }
|
|
|
1839
|
|
86
|
1840 ngx_escape_uri(p, r->uri.data + u->conf->location->len,
|
|
|
1841 r->uri.len - u->conf->location->len, NGX_ESCAPE_URI);
|
|
|
1842
|
|
|
1843 line.len = len;
|
|
|
1844 line.data = p;
|
|
|
1845
|
|
|
1846 return ngx_snprintf(buf, len, "%V", &line);
|
|
28
|
1847 }
|
|
|
1848
|
|
86
|
1849 } else {
|
|
|
1850 line.len = r->uri.len - u->conf->location->len;
|
|
|
1851 if (line.len > len) {
|
|
|
1852 line.len = len;
|
|
28
|
1853 }
|
|
|
1854
|
|
86
|
1855 line.data = r->uri.data + u->conf->location->len;
|
|
|
1856 p = ngx_snprintf(buf, len, "%V", &line);
|
|
28
|
1857
|
|
86
|
1858 len -= p - buf;
|
|
|
1859 buf = p;
|
|
28
|
1860 }
|
|
|
1861
|
|
54
|
1862 if (r->args.len) {
|
|
|
1863 p = ngx_snprintf(buf, len, "?%V", &r->args);
|
|
|
1864 len -= p - buf;
|
|
|
1865 buf = p;
|
|
|
1866 }
|
|
|
1867
|
|
|
1868 return ngx_http_log_error_info(r, buf, len);
|
|
28
|
1869 }
|
|
|
1870
|
|
|
1871
|
|
36
|
1872 static ngx_int_t
|
|
|
1873 ngx_http_upstream_add_log_formats(ngx_conf_t *cf)
|
|
28
|
1874 {
|
|
|
1875 ngx_http_log_op_name_t *op;
|
|
|
1876
|
|
|
1877 for (op = ngx_http_upstream_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
|
1878 op->run = NULL;
|
|
|
1879
|
|
|
1880 for (op = ngx_http_log_fmt_ops; op->run; op++) {
|
|
|
1881 if (op->name.len == 0) {
|
|
|
1882 op = (ngx_http_log_op_name_t *) op->run;
|
|
|
1883 }
|
|
|
1884 }
|
|
|
1885
|
|
|
1886 op->run = (ngx_http_log_op_run_pt) ngx_http_upstream_log_fmt_ops;
|
|
|
1887
|
|
|
1888 return NGX_OK;
|
|
|
1889 }
|
|
58
|
1890
|
|
|
1891
|
|
|
1892 static void *
|
|
|
1893 ngx_http_upstream_create_main_conf(ngx_conf_t *cf)
|
|
|
1894 {
|
|
|
1895 ngx_http_upstream_main_conf_t *umcf;
|
|
|
1896
|
|
|
1897 umcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_main_conf_t));
|
|
|
1898 if (umcf == NULL) {
|
|
|
1899 return NULL;
|
|
|
1900 }
|
|
|
1901
|
|
|
1902 return umcf;
|
|
|
1903 }
|
|
|
1904
|
|
|
1905
|
|
|
1906 static char *
|
|
|
1907 ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf)
|
|
|
1908 {
|
|
|
1909 ngx_http_upstream_main_conf_t *umcf = conf;
|
|
|
1910
|
|
|
1911 umcf->headers_in_hash.max_size = 100;
|
|
|
1912 umcf->headers_in_hash.bucket_limit = 1;
|
|
|
1913 umcf->headers_in_hash.bucket_size = sizeof(ngx_http_upstream_header_t);
|
|
|
1914 umcf->headers_in_hash.name = "upstream_headers_in";
|
|
|
1915
|
|
|
1916 if (ngx_hash_init(&umcf->headers_in_hash, cf->pool,
|
|
|
1917 ngx_http_upstream_headers_in, 0) != NGX_OK)
|
|
|
1918 {
|
|
|
1919 return NGX_CONF_ERROR;
|
|
|
1920 }
|
|
|
1921
|
|
|
1922 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, cf->log, 0,
|
|
|
1923 "http upstream headers_in hash size: %ui, "
|
|
|
1924 "max buckets per entry: %ui",
|
|
|
1925 umcf->headers_in_hash.hash_size,
|
|
|
1926 umcf->headers_in_hash.min_buckets);
|
|
|
1927
|
|
|
1928 return NGX_CONF_OK;
|
|
|
1929 }
|
