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0
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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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9 #include <ngx_event.h>
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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_read_client_request_body_handler(ngx_http_request_t *r);
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14 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r);
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182
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15 static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r,
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16 ngx_chain_t *body);
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17 static void ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc);
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18 static void ngx_http_read_discarded_body_handler(ngx_http_request_t *r);
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19 static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r);
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20
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0
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21
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28
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22 /*
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23 * on completion ngx_http_read_client_request_body() adds to
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24 * r->request_body->bufs one or two bufs:
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25 * *) one memory buf that was preread in r->header_in;
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26 * *) one memory or file buf that contains the rest of the body
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27 */
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0
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28
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50
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29 ngx_int_t
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30 ngx_http_read_client_request_body(ngx_http_request_t *r,
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31 ngx_http_client_body_handler_pt post_handler)
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0
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32 {
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212
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33 size_t preread;
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34 ssize_t size;
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0
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35 ngx_buf_t *b;
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182
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36 ngx_chain_t *cl, **next;
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28
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37 ngx_http_request_body_t *rb;
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0
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38 ngx_http_core_loc_conf_t *clcf;
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39
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86
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40 if (r->request_body || r->discard_body) {
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58
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41 post_handler(r);
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42 return NGX_OK;
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43 }
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44
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50
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45 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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46 if (rb == NULL) {
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28
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47 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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48 }
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49
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50 r->request_body = rb;
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51
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52 if (r->headers_in.content_length_n <= 0) {
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53 post_handler(r);
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54 return NGX_OK;
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55 }
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56
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57 rb->post_handler = post_handler;
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58
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59 /*
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60 * set by ngx_pcalloc():
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61 *
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62 * rb->bufs = NULL;
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63 * rb->buf = NULL;
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64 * rb->rest = 0;
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65 */
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66
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182
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67 preread = r->header_in->last - r->header_in->pos;
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0
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68
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182
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69 if (preread) {
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0
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70
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71 /* there is the pre-read part of the request body */
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72
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182
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73 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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74 "http client request body preread %uz", preread);
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75
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50
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76 b = ngx_calloc_buf(r->pool);
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77 if (b == NULL) {
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28
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78 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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79 }
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0
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80
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81 b->temporary = 1;
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182
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82 b->start = r->header_in->pos;
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83 b->pos = r->header_in->pos;
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84 b->last = r->header_in->last;
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85 b->end = r->header_in->end;
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0
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86
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50
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87 rb->bufs = ngx_alloc_chain_link(r->pool);
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88 if (rb->bufs == NULL) {
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28
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89 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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90 }
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91
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92 rb->bufs->buf = b;
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93 rb->bufs->next = NULL;
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0
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94
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216
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95 rb->buf = b;
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96
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214
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97 if ((off_t) preread >= r->headers_in.content_length_n) {
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0
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98
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99 /* the whole request body was pre-read */
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100
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212
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101 r->header_in->pos += (size_t) r->headers_in.content_length_n;
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24
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102 r->request_length += r->headers_in.content_length_n;
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0
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103
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182
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104 if (r->request_body_in_file_only) {
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105 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
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106 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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107 }
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108 }
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109
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28
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110 post_handler(r);
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0
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111
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112 return NGX_OK;
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113 }
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114
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182
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115 /*
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116 * to not consider the body as pipelined request in
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117 * ngx_http_set_keepalive()
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118 */
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0
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119 r->header_in->pos = r->header_in->last;
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182
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120
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121 r->request_length += preread;
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122
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123 rb->rest = r->headers_in.content_length_n - preread;
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124
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214
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125 if (rb->rest <= (off_t) (b->end - b->last)) {
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182
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126
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127 /* the whole request body may be placed in r->header_in */
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128
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129 r->read_event_handler = ngx_http_read_client_request_body_handler;
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130
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131 return ngx_http_do_read_client_request_body(r);
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132 }
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133
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134 next = &rb->bufs->next;
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135
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136 } else {
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137 b = NULL;
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138 rb->rest = r->headers_in.content_length_n;
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139 next = &rb->bufs;
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0
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140 }
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141
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142 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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143
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182
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144 size = clcf->client_body_buffer_size;
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145 size += size >> 2;
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0
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146
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212
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147 if (rb->rest < size) {
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148 size = (ssize_t) rb->rest;
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0
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149
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182
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150 if (r->request_body_in_single_buf) {
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151 size += preread;
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152 }
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153
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0
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154 } else {
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155 size = clcf->client_body_buffer_size;
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182
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156
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157 /* disable copying buffer for r->request_body_in_single_buf */
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158 b = NULL;
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0
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159 }
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160
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50
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161 rb->buf = ngx_create_temp_buf(r->pool, size);
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162 if (rb->buf == NULL) {
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28
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163 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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164 }
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0
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165
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50
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166 cl = ngx_alloc_chain_link(r->pool);
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167 if (cl == NULL) {
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28
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168 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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169 }
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0
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170
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28
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171 cl->buf = rb->buf;
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172 cl->next = NULL;
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173
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182
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174 if (b && r->request_body_in_single_buf) {
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175 size = b->last - b->pos;
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176 ngx_memcpy(rb->buf->pos, b->pos, size);
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177 rb->buf->last += size;
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178
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179 next = &rb->bufs;
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180 }
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181
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182 *next = cl;
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183
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184 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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185 rb->to_write = rb->bufs;
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0
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186
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187 } else {
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182
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188 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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189 }
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190
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58
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191 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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192
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58
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193 return ngx_http_do_read_client_request_body(r);
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0
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194 }
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195
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196
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50
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197 static void
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58
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198 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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199 {
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58
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200 ngx_int_t rc;
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0
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201
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58
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202 if (r->connection->read->timedout) {
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126
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203 r->connection->timedout = 1;
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182
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204 ngx_http_finalize_request_body(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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205 return;
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206 }
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207
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58
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208 rc = ngx_http_do_read_client_request_body(r);
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0
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209
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210 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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182
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211 ngx_http_finalize_request_body(r, rc);
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0
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212 }
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213 }
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214
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215
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50
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216 static ngx_int_t
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58
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217 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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218 {
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219 size_t size;
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220 ssize_t n;
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221 ngx_buf_t *b;
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58
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222 ngx_connection_t *c;
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28
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223 ngx_http_request_body_t *rb;
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0
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224 ngx_http_core_loc_conf_t *clcf;
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225
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58
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226 c = r->connection;
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28
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227 rb = r->request_body;
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0
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228
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229 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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230 "http read client request body");
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231
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232 for ( ;; ) {
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28
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233 if (rb->buf->last == rb->buf->end) {
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234
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182
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235 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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236 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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237 }
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238
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182
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239 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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28
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240 rb->buf->last = rb->buf->start;
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0
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241 }
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242
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28
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243 size = rb->buf->end - rb->buf->last;
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0
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244
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214
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245 if ((off_t) size > rb->rest) {
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212
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246 size = (size_t) rb->rest;
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0
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247 }
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248
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28
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249 n = c->recv(c, rb->buf->last, size);
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0
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250
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251 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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10
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252 "http client request body recv %z", n);
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0
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253
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254 if (n == NGX_AGAIN) {
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122
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255 break;
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0
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256 }
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257
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258 if (n == 0) {
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259 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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260 "client closed prematurely connection");
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261 }
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262
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263 if (n == 0 || n == NGX_ERROR) {
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132
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264 c->error = 1;
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0
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265 return NGX_HTTP_BAD_REQUEST;
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266 }
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267
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28
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268 rb->buf->last += n;
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269 rb->rest -= n;
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24
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270 r->request_length += n;
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0
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271
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28
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272 if (rb->rest == 0) {
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0
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273 break;
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274 }
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275
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28
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276 if (rb->buf->last < rb->buf->end) {
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0
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277 break;
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278 }
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279 }
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280
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281 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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28
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282 "http client request body rest %uz", rb->rest);
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0
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283
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28
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284 if (rb->rest) {
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122
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285 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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286 ngx_add_timer(c->read, clcf->client_body_timeout);
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287
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288 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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289 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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290 }
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291
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0
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292 return NGX_AGAIN;
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293 }
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294
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122
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295 if (c->read->timer_set) {
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296 ngx_del_timer(c->read);
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297 }
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298
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182
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299 if (rb->temp_file || r->request_body_in_file_only) {
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0
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300
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301 /* save the last part */
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28
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302
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182
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303 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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304 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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305 }
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306
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50
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307 b = ngx_calloc_buf(r->pool);
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308 if (b == NULL) {
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0
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309 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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310 }
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311
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312 b->in_file = 1;
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313 b->file_pos = 0;
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28
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314 b->file_last = rb->temp_file->file.offset;
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315 b->file = &rb->temp_file->file;
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0
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316
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28
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317 if (rb->bufs->next) {
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318 rb->bufs->next->buf = b;
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0
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319
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320 } else {
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28
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321 rb->bufs->buf = b;
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0
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322 }
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323 }
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324
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182
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325 if (r->request_body_in_file_only && rb->bufs->next) {
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326 rb->bufs = rb->bufs->next;
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327 }
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328
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28
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329 rb->post_handler(r);
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0
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330
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331 return NGX_OK;
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332 }
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182
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333
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334
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335 static ngx_int_t
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336 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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337 {
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338 ssize_t n;
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339 ngx_temp_file_t *tf;
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340 ngx_http_request_body_t *rb;
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341 ngx_http_core_loc_conf_t *clcf;
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342
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343 rb = r->request_body;
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344
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345 if (rb->temp_file == NULL) {
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346 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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347 if (tf == NULL) {
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348 return NGX_ERROR;
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349 }
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350
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351 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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352
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353 tf->file.fd = NGX_INVALID_FILE;
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354 tf->file.log = r->connection->log;
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355 tf->path = clcf->client_body_temp_path;
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356 tf->pool = r->pool;
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357 tf->warn = "a client request body is buffered to a temporary file";
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186
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358 tf->log_level = r->request_body_file_log_level;
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182
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359 tf->persistent = r->request_body_in_persistent_file;
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360
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361 if (r->request_body_file_group_access) {
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362 tf->mode = 0660;
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363 }
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364
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365 rb->temp_file = tf;
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366 }
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367
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368 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
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369
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370 /* TODO: n == 0 or not complete and level event */
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371
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372 if (n == NGX_ERROR) {
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373 return NGX_ERROR;
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374 }
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375
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376 rb->temp_file->offset += n;
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377
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378 return NGX_OK;
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379 }
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380
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381
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382 static void
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383 ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc)
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|
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384 {
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385 if (r->request_body->temp_file
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386 && r->request_body_in_persistent_file
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387 && r->request_body_delete_incomplete_file)
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388 {
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389 if (ngx_delete_file(r->request_body->temp_file->file.name.data)
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390 == NGX_FILE_ERROR)
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391 {
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392 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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393 ngx_delete_file_n " \"%s\" failed",
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394 r->request_body->temp_file->file.name.data);
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395 }
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396 }
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397
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398 ngx_http_finalize_request(r, rc);
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399 }
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400
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401
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402 ngx_int_t
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403 ngx_http_discard_body(ngx_http_request_t *r)
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404 {
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|
|
405 ssize_t size;
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406 ngx_event_t *rev;
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407
|
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222
|
408 if (r != r->main || r->discard_body) {
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182
|
409 return NGX_OK;
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|
|
410 }
|
|
|
411
|
|
|
412 rev = r->connection->read;
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|
|
413
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|
|
414 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
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|
|
415
|
|
|
416 if (rev->timer_set) {
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|
|
417 ngx_del_timer(rev);
|
|
|
418 }
|
|
|
419
|
|
230
|
420 r->discard_body = 1;
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|
|
421
|
|
182
|
422 if (r->headers_in.content_length_n <= 0) {
|
|
|
423 return NGX_OK;
|
|
|
424 }
|
|
|
425
|
|
|
426 size = r->header_in->last - r->header_in->pos;
|
|
|
427
|
|
|
428 if (size) {
|
|
|
429 if (r->headers_in.content_length_n > size) {
|
|
|
430 r->headers_in.content_length_n -= size;
|
|
|
431
|
|
|
432 } else {
|
|
212
|
433 r->header_in->pos += (size_t) r->headers_in.content_length_n;
|
|
182
|
434 r->headers_in.content_length_n = 0;
|
|
|
435 return NGX_OK;
|
|
|
436 }
|
|
|
437 }
|
|
|
438
|
|
|
439 r->read_event_handler = ngx_http_read_discarded_body_handler;
|
|
|
440
|
|
|
441 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
442 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
443 }
|
|
|
444
|
|
|
445 return ngx_http_read_discarded_body(r);
|
|
|
446 }
|
|
|
447
|
|
|
448
|
|
|
449 static void
|
|
|
450 ngx_http_read_discarded_body_handler(ngx_http_request_t *r)
|
|
|
451 {
|
|
|
452 ngx_int_t rc;
|
|
|
453
|
|
|
454 rc = ngx_http_read_discarded_body(r);
|
|
|
455
|
|
|
456 if (rc == NGX_AGAIN) {
|
|
|
457 if (ngx_handle_read_event(r->connection->read, 0) == NGX_ERROR) {
|
|
|
458 ngx_http_finalize_request(r, rc);
|
|
|
459 return;
|
|
|
460 }
|
|
|
461 }
|
|
|
462
|
|
|
463 if (rc != NGX_OK) {
|
|
|
464 ngx_http_finalize_request(r, rc);
|
|
|
465 }
|
|
|
466 }
|
|
|
467
|
|
|
468
|
|
|
469 static ngx_int_t
|
|
|
470 ngx_http_read_discarded_body(ngx_http_request_t *r)
|
|
|
471 {
|
|
212
|
472 size_t size;
|
|
|
473 ssize_t n;
|
|
182
|
474 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
475
|
|
|
476 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
477 "http read discarded body");
|
|
|
478
|
|
|
479 if (r->headers_in.content_length_n == 0) {
|
|
|
480 return NGX_OK;
|
|
|
481 }
|
|
|
482
|
|
212
|
483 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ?
|
|
|
484 NGX_HTTP_DISCARD_BUFFER_SIZE:
|
|
|
485 (size_t) r->headers_in.content_length_n;
|
|
182
|
486
|
|
|
487 n = r->connection->recv(r->connection, buffer, size);
|
|
|
488
|
|
|
489 if (n == NGX_ERROR) {
|
|
|
490
|
|
|
491 r->connection->error = 1;
|
|
|
492
|
|
|
493 /*
|
|
|
494 * if a client request body is discarded then we already set
|
|
|
495 * some HTTP response code for client and we can ignore the error
|
|
|
496 */
|
|
|
497
|
|
|
498 return NGX_OK;
|
|
|
499 }
|
|
|
500
|
|
|
501 if (n == NGX_AGAIN) {
|
|
|
502 return NGX_AGAIN;
|
|
|
503 }
|
|
|
504
|
|
|
505 r->headers_in.content_length_n -= n;
|
|
|
506
|
|
|
507 return NGX_OK;
|
|
|
508 }
|
