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