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