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