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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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13 static void ngx_http_read_client_request_body_handler(ngx_event_t *rev);
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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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15
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16
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17 ngx_int_t ngx_http_read_client_request_body(ngx_http_request_t *r)
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18 {
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19 ssize_t size;
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20 ngx_buf_t *b;
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21 ngx_chain_t *cl;
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22 ngx_http_core_loc_conf_t *clcf;
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23
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24 size = r->header_in->last - r->header_in->pos;
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25
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26 if (size) {
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27
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28 /* there is the pre-read part of the request body */
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29
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30 ngx_test_null(b, ngx_calloc_buf(r->pool),
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31 NGX_HTTP_INTERNAL_SERVER_ERROR);
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32
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33 b->temporary = 1;
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34 b->start = b->pos = r->header_in->pos;
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35 b->end = b->last = r->header_in->last;
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36
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37 ngx_alloc_link_and_set_buf(r->request_body->bufs, b, r->pool,
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38 NGX_HTTP_INTERNAL_SERVER_ERROR);
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39
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40 if (size >= r->headers_in.content_length_n) {
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41
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42 /* the whole request body was pre-read */
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43
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44 r->header_in->pos += r->headers_in.content_length_n;
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45
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46 r->request_body->handler(r->request_body->data);
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47
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48 return NGX_OK;
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49 }
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50
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51 r->header_in->pos = r->header_in->last;
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52 }
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53
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54
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55 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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56
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57 r->request_body->rest = r->headers_in.content_length_n - size;
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58
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59 if (r->request_body->rest
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60 < clcf->client_body_buffer_size
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61 + (clcf->client_body_buffer_size >> 2))
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62 {
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63 size = r->request_body->rest;
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64
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65 } else {
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66 size = clcf->client_body_buffer_size;
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67 }
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68
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69 ngx_test_null(r->request_body->buf, ngx_create_temp_buf(r->pool, size),
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70 NGX_HTTP_INTERNAL_SERVER_ERROR);
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71
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72 ngx_alloc_link_and_set_buf(cl, r->request_body->buf, r->pool,
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73 NGX_HTTP_INTERNAL_SERVER_ERROR);
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74
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75 if (r->request_body->bufs) {
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76 r->request_body->bufs->next = cl;
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77
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78 } else {
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79 r->request_body->bufs = cl;
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80 }
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81
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82 r->connection->read->event_handler =
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83 ngx_http_read_client_request_body_handler;
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84
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85 return ngx_http_do_read_client_request_body(r);
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86 }
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87
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88
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89 static void ngx_http_read_client_request_body_handler(ngx_event_t *rev)
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90 {
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91 ngx_int_t rc;
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92 ngx_connection_t *c;
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93 ngx_http_request_t *r;
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94
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95 c = rev->data;
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96 r = c->data;
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97
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98 if (rev->timedout) {
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99 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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100 return;
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101 }
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102
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103 rc = ngx_http_do_read_client_request_body(r);
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104
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105 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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106 ngx_http_finalize_request(r, rc);
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107 }
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108 }
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109
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110
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111 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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112 {
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113 size_t size;
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114 ssize_t n;
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115 ngx_buf_t *b;
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116 ngx_connection_t *c;
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117 ngx_http_core_loc_conf_t *clcf;
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118
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119 c = r->connection;
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120
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121 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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122 "http read client request body");
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123
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124 for ( ;; ) {
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125 if (r->request_body->buf->last == r->request_body->buf->end) {
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126 n = ngx_write_chain_to_temp_file(r->request_body->temp_file,
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127 r->request_body->bufs->next ? r->request_body->bufs->next:
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128 r->request_body->bufs);
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129
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130 /* TODO: n == 0 or not complete and level event */
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131
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132 if (n == NGX_ERROR) {
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133 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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134 }
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135
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136 r->request_body->temp_file->offset += n;
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137
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138 r->request_body->buf->pos = r->request_body->buf->start;
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139 r->request_body->buf->last = r->request_body->buf->start;
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140 }
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141
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142 size = r->request_body->buf->end - r->request_body->buf->last;
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143
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144 if (size > r->request_body->rest) {
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145 size = r->request_body->rest;
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146 }
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147
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148 n = c->recv(c, r->request_body->buf->last, size);
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149
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150 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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151 "http client request body recv " SIZE_T_FMT, n);
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152
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153 if (n == NGX_AGAIN) {
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154 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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155 ngx_add_timer(c->read, clcf->client_body_timeout);
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156
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157 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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158 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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159 }
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160
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161 return NGX_AGAIN;
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162 }
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163
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164 if (n == 0) {
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165 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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166 "client closed prematurely connection");
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167 }
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168
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169 if (n == 0 || n == NGX_ERROR) {
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170 r->closed = 1;
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171 return NGX_HTTP_BAD_REQUEST;
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172 }
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173
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174 r->request_body->buf->last += n;
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175 r->request_body->rest -= n;
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176
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177 if (r->request_body->rest == 0) {
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178 break;
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179 }
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180
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181 if (r->request_body->buf->last < r->request_body->buf->end) {
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182 break;
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183 }
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184 }
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185
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186 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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187 "http client request body rest " SIZE_T_FMT,
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188 r->request_body->rest);
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189
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190 if (r->request_body->rest) {
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191 return NGX_AGAIN;
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192 }
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193
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194 if (r->request_body->temp_file->file.fd != NGX_INVALID_FILE) {
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195
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196 /* save the last part */
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197 n = ngx_write_chain_to_temp_file(r->request_body->temp_file,
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198 r->request_body->bufs->next ? r->request_body->bufs->next:
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199 r->request_body->bufs);
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200
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201 /* TODO: n == 0 or not complete and level event */
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202
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203 if (n == NGX_ERROR) {
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204 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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205 }
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206
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207 if (!(b = ngx_calloc_buf(r->pool))) {
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208 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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209 }
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210
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211 b->in_file = 1;
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212 b->file_pos = 0;
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213 b->file_last = r->request_body->temp_file->file.offset;
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214 b->file = &r->request_body->temp_file->file;
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215
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216 if (r->request_body->bufs->next) {
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217 r->request_body->bufs->next->buf = b;
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218
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219 } else {
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220 r->request_body->bufs->buf = b;
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221 }
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222 }
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223
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224 r->request_body->handler(r->request_body->data);
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225
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226 return NGX_OK;
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227 }
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