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