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