Mercurial > hg > nginx
annotate src/http/ngx_http_request_body.c @ 4005:e56c1e9873cb
Correctly set body if it's preread and there are extra data.
Previously all available data was used as body, resulting in garbage after
real body e.g. in case of pipelined requests. Make sure to use only as many
bytes as request's Content-Length specifies.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 18 Aug 2011 15:27:57 +0000 |
| parents | 798a7f1d3b2f |
| children | 87f47e05fc82 |
| rev | line source |
|---|---|
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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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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_http.h> |
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10 |
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11 |
| 509 | 12 static void ngx_http_read_client_request_body_handler(ngx_http_request_t *r); |
| 13 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r); | |
| 633 | 14 static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r, |
| 15 ngx_chain_t *body); | |
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16 static ngx_int_t ngx_http_read_discarded_request_body(ngx_http_request_t *r); |
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17 static ngx_int_t ngx_http_test_expect(ngx_http_request_t *r); |
| 633 | 18 |
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19 |
| 479 | 20 /* |
| 21 * on completion ngx_http_read_client_request_body() adds to | |
| 22 * r->request_body->bufs one or two bufs: | |
| 23 * *) one memory buf that was preread in r->header_in; | |
| 24 * *) one memory or file buf that contains the rest of the body | |
| 25 */ | |
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26 |
| 501 | 27 ngx_int_t |
| 28 ngx_http_read_client_request_body(ngx_http_request_t *r, | |
| 29 ngx_http_client_body_handler_pt post_handler) | |
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30 { |
| 663 | 31 size_t preread; |
| 32 ssize_t size; | |
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33 ngx_buf_t *b; |
| 633 | 34 ngx_chain_t *cl, **next; |
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35 ngx_temp_file_t *tf; |
| 479 | 36 ngx_http_request_body_t *rb; |
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37 ngx_http_core_loc_conf_t *clcf; |
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38 |
| 3049 | 39 r->main->count++; |
| 40 | |
| 537 | 41 if (r->request_body || r->discard_body) { |
| 509 | 42 post_handler(r); |
| 43 return NGX_OK; | |
| 44 } | |
| 45 | |
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46 if (ngx_http_test_expect(r) != NGX_OK) { |
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47 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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48 } |
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49 |
| 501 | 50 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t)); |
| 51 if (rb == NULL) { | |
| 479 | 52 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 53 } | |
| 54 | |
| 55 r->request_body = rb; | |
| 56 | |
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57 if (r->headers_in.content_length_n < 0) { |
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58 post_handler(r); |
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59 return NGX_OK; |
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60 } |
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61 |
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62 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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63 |
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64 if (r->headers_in.content_length_n == 0) { |
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65 |
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66 if (r->request_body_in_file_only) { |
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67 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)); |
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68 if (tf == NULL) { |
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69 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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70 } |
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71 |
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72 tf->file.fd = NGX_INVALID_FILE; |
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73 tf->file.log = r->connection->log; |
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74 tf->path = clcf->client_body_temp_path; |
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75 tf->pool = r->pool; |
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76 tf->warn = "a client request body is buffered to a temporary file"; |
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77 tf->log_level = r->request_body_file_log_level; |
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78 tf->persistent = r->request_body_in_persistent_file; |
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79 tf->clean = r->request_body_in_clean_file; |
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80 |
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81 if (r->request_body_file_group_access) { |
| 1046 | 82 tf->access = 0660; |
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83 } |
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84 |
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85 rb->temp_file = tf; |
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86 |
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87 if (ngx_create_temp_file(&tf->file, tf->path, tf->pool, |
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88 tf->persistent, tf->clean, tf->access) |
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89 != NGX_OK) |
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90 { |
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91 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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92 } |
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93 } |
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94 |
| 479 | 95 post_handler(r); |
| 1290 | 96 |
| 479 | 97 return NGX_OK; |
| 98 } | |
| 99 | |
| 100 rb->post_handler = post_handler; | |
| 101 | |
| 102 /* | |
| 103 * set by ngx_pcalloc(): | |
| 104 * | |
| 105 * rb->bufs = NULL; | |
| 106 * rb->buf = NULL; | |
| 107 * rb->rest = 0; | |
| 108 */ | |
| 109 | |
| 633 | 110 preread = r->header_in->last - r->header_in->pos; |
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111 |
| 633 | 112 if (preread) { |
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113 |
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114 /* there is the pre-read part of the request body */ |
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115 |
| 633 | 116 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| 117 "http client request body preread %uz", preread); | |
| 118 | |
| 501 | 119 b = ngx_calloc_buf(r->pool); |
| 120 if (b == NULL) { | |
| 479 | 121 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 122 } | |
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123 |
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124 b->temporary = 1; |
| 633 | 125 b->start = r->header_in->pos; |
| 126 b->pos = r->header_in->pos; | |
| 127 b->last = r->header_in->last; | |
| 128 b->end = r->header_in->end; | |
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129 |
| 501 | 130 rb->bufs = ngx_alloc_chain_link(r->pool); |
| 131 if (rb->bufs == NULL) { | |
| 479 | 132 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 133 } | |
| 134 | |
| 135 rb->bufs->buf = b; | |
| 136 rb->bufs->next = NULL; | |
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137 |
| 667 | 138 rb->buf = b; |
| 139 | |
| 665 | 140 if ((off_t) preread >= r->headers_in.content_length_n) { |
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141 |
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142 /* the whole request body was pre-read */ |
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143 |
| 663 | 144 r->header_in->pos += (size_t) r->headers_in.content_length_n; |
| 475 | 145 r->request_length += r->headers_in.content_length_n; |
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146 b->last = r->header_in->pos; |
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147 |
| 633 | 148 if (r->request_body_in_file_only) { |
| 149 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) { | |
| 150 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 151 } | |
| 152 } | |
| 153 | |
| 479 | 154 post_handler(r); |
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155 |
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156 return NGX_OK; |
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157 } |
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158 |
| 633 | 159 /* |
| 160 * to not consider the body as pipelined request in | |
| 161 * ngx_http_set_keepalive() | |
| 162 */ | |
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163 r->header_in->pos = r->header_in->last; |
| 633 | 164 |
| 165 r->request_length += preread; | |
| 166 | |
| 167 rb->rest = r->headers_in.content_length_n - preread; | |
| 168 | |
| 665 | 169 if (rb->rest <= (off_t) (b->end - b->last)) { |
| 633 | 170 |
| 171 /* the whole request body may be placed in r->header_in */ | |
| 172 | |
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173 rb->to_write = rb->bufs; |
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174 |
| 633 | 175 r->read_event_handler = ngx_http_read_client_request_body_handler; |
| 176 | |
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177 return ngx_http_do_read_client_request_body(r); |
| 633 | 178 } |
| 179 | |
| 180 next = &rb->bufs->next; | |
| 181 | |
| 182 } else { | |
| 183 b = NULL; | |
| 184 rb->rest = r->headers_in.content_length_n; | |
| 185 next = &rb->bufs; | |
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186 } |
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187 |
| 633 | 188 size = clcf->client_body_buffer_size; |
| 189 size += size >> 2; | |
|
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190 |
| 663 | 191 if (rb->rest < size) { |
| 192 size = (ssize_t) rb->rest; | |
|
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193 |
| 633 | 194 if (r->request_body_in_single_buf) { |
| 195 size += preread; | |
| 196 } | |
| 197 | |
|
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198 } else { |
|
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199 size = clcf->client_body_buffer_size; |
| 633 | 200 |
| 201 /* disable copying buffer for r->request_body_in_single_buf */ | |
| 202 b = NULL; | |
|
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203 } |
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204 |
| 501 | 205 rb->buf = ngx_create_temp_buf(r->pool, size); |
| 206 if (rb->buf == NULL) { | |
| 479 | 207 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 208 } | |
|
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209 |
| 501 | 210 cl = ngx_alloc_chain_link(r->pool); |
| 211 if (cl == NULL) { | |
| 479 | 212 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 213 } | |
|
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214 |
| 479 | 215 cl->buf = rb->buf; |
| 216 cl->next = NULL; | |
| 217 | |
| 633 | 218 if (b && r->request_body_in_single_buf) { |
| 219 size = b->last - b->pos; | |
| 220 ngx_memcpy(rb->buf->pos, b->pos, size); | |
| 221 rb->buf->last += size; | |
| 222 | |
| 223 next = &rb->bufs; | |
| 224 } | |
| 225 | |
| 226 *next = cl; | |
| 227 | |
| 228 if (r->request_body_in_file_only || r->request_body_in_single_buf) { | |
| 229 rb->to_write = rb->bufs; | |
|
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230 |
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231 } else { |
| 633 | 232 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs; |
|
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233 } |
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234 |
| 509 | 235 r->read_event_handler = ngx_http_read_client_request_body_handler; |
|
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236 |
|
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237 return ngx_http_do_read_client_request_body(r); |
|
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238 } |
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239 |
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240 |
| 501 | 241 static void |
| 509 | 242 ngx_http_read_client_request_body_handler(ngx_http_request_t *r) |
|
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243 { |
| 509 | 244 ngx_int_t rc; |
|
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245 |
| 509 | 246 if (r->connection->read->timedout) { |
| 577 | 247 r->connection->timedout = 1; |
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248 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT); |
|
299
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249 return; |
|
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250 } |
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251 |
| 509 | 252 rc = ngx_http_do_read_client_request_body(r); |
|
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253 |
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254 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { |
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255 ngx_http_finalize_request(r, rc); |
|
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256 } |
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257 } |
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258 |
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259 |
| 501 | 260 static ngx_int_t |
| 509 | 261 ngx_http_do_read_client_request_body(ngx_http_request_t *r) |
|
293
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262 { |
|
290
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263 size_t size; |
|
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264 ssize_t n; |
|
343
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265 ngx_buf_t *b; |
| 509 | 266 ngx_connection_t *c; |
| 479 | 267 ngx_http_request_body_t *rb; |
|
162
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268 ngx_http_core_loc_conf_t *clcf; |
|
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269 |
| 509 | 270 c = r->connection; |
| 479 | 271 rb = r->request_body; |
|
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272 |
|
292
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273 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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274 "http read client request body"); |
|
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275 |
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276 for ( ;; ) { |
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277 for ( ;; ) { |
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278 if (rb->buf->last == rb->buf->end) { |
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279 |
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280 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) { |
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281 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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282 } |
| 479 | 283 |
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284 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs; |
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285 rb->buf->last = rb->buf->start; |
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286 } |
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287 |
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288 size = rb->buf->end - rb->buf->last; |
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289 |
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290 if ((off_t) size > rb->rest) { |
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291 size = (size_t) rb->rest; |
|
292
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292 } |
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293 |
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294 n = c->recv(c, rb->buf->last, size); |
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295 |
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296 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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297 "http client request body recv %z", n); |
|
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298 |
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299 if (n == NGX_AGAIN) { |
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300 break; |
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301 } |
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302 |
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303 if (n == 0) { |
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304 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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305 "client closed prematurely connection"); |
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306 } |
|
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307 |
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308 if (n == 0 || n == NGX_ERROR) { |
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309 c->error = 1; |
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310 return NGX_HTTP_BAD_REQUEST; |
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311 } |
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312 |
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313 rb->buf->last += n; |
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314 rb->rest -= n; |
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315 r->request_length += n; |
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316 |
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317 if (rb->rest == 0) { |
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318 break; |
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319 } |
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320 |
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321 if (rb->buf->last < rb->buf->end) { |
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322 break; |
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323 } |
|
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324 } |
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325 |
|
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326 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| 1112 | 327 "http client request body rest %O", rb->rest); |
|
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328 |
| 479 | 329 if (rb->rest == 0) { |
|
294
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330 break; |
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331 } |
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332 |
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333 if (!c->read->ready) { |
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334 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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335 ngx_add_timer(c->read, clcf->client_body_timeout); |
|
293
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336 |
|
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|
337 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
|
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338 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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339 } |
| 573 | 340 |
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341 return NGX_AGAIN; |
| 573 | 342 } |
|
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343 } |
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344 |
| 573 | 345 if (c->read->timer_set) { |
| 346 ngx_del_timer(c->read); | |
| 347 } | |
| 348 | |
| 633 | 349 if (rb->temp_file || r->request_body_in_file_only) { |
|
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350 |
|
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351 /* save the last part */ |
| 479 | 352 |
| 633 | 353 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) { |
|
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354 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
|
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355 } |
|
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356 |
| 501 | 357 b = ngx_calloc_buf(r->pool); |
| 358 if (b == NULL) { | |
|
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359 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
|
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360 } |
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361 |
|
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362 b->in_file = 1; |
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363 b->file_pos = 0; |
| 479 | 364 b->file_last = rb->temp_file->file.offset; |
| 365 b->file = &rb->temp_file->file; | |
|
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366 |
| 479 | 367 if (rb->bufs->next) { |
| 368 rb->bufs->next->buf = b; | |
|
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369 |
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370 } else { |
| 479 | 371 rb->bufs->buf = b; |
|
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372 } |
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373 } |
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374 |
| 633 | 375 if (r->request_body_in_file_only && rb->bufs->next) { |
| 376 rb->bufs = rb->bufs->next; | |
| 377 } | |
| 378 | |
| 479 | 379 rb->post_handler(r); |
|
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380 |
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381 return NGX_OK; |
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382 } |
| 633 | 383 |
| 384 | |
| 385 static ngx_int_t | |
| 386 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body) | |
| 387 { | |
| 388 ssize_t n; | |
| 389 ngx_temp_file_t *tf; | |
| 390 ngx_http_request_body_t *rb; | |
| 391 ngx_http_core_loc_conf_t *clcf; | |
| 392 | |
| 393 rb = r->request_body; | |
| 394 | |
| 395 if (rb->temp_file == NULL) { | |
| 396 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)); | |
| 397 if (tf == NULL) { | |
| 398 return NGX_ERROR; | |
| 399 } | |
| 400 | |
| 401 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
| 402 | |
| 403 tf->file.fd = NGX_INVALID_FILE; | |
| 404 tf->file.log = r->connection->log; | |
| 405 tf->path = clcf->client_body_temp_path; | |
| 406 tf->pool = r->pool; | |
| 407 tf->warn = "a client request body is buffered to a temporary file"; | |
| 637 | 408 tf->log_level = r->request_body_file_log_level; |
| 633 | 409 tf->persistent = r->request_body_in_persistent_file; |
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410 tf->clean = r->request_body_in_clean_file; |
| 633 | 411 |
| 412 if (r->request_body_file_group_access) { | |
| 1046 | 413 tf->access = 0660; |
| 633 | 414 } |
| 415 | |
| 416 rb->temp_file = tf; | |
| 417 } | |
| 418 | |
| 419 n = ngx_write_chain_to_temp_file(rb->temp_file, body); | |
| 420 | |
| 421 /* TODO: n == 0 or not complete and level event */ | |
| 422 | |
| 423 if (n == NGX_ERROR) { | |
| 424 return NGX_ERROR; | |
| 425 } | |
| 426 | |
| 427 rb->temp_file->offset += n; | |
| 428 | |
| 429 return NGX_OK; | |
| 430 } | |
| 431 | |
| 432 | |
| 433 ngx_int_t | |
|
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434 ngx_http_discard_request_body(ngx_http_request_t *r) |
| 633 | 435 { |
| 436 ssize_t size; | |
| 437 ngx_event_t *rev; | |
| 438 | |
| 673 | 439 if (r != r->main || r->discard_body) { |
| 633 | 440 return NGX_OK; |
| 441 } | |
| 442 | |
|
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443 if (ngx_http_test_expect(r) != NGX_OK) { |
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444 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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445 } |
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446 |
| 633 | 447 rev = r->connection->read; |
| 448 | |
| 449 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body"); | |
| 450 | |
| 451 if (rev->timer_set) { | |
| 452 ngx_del_timer(rev); | |
| 453 } | |
| 454 | |
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455 if (r->headers_in.content_length_n <= 0 || r->request_body) { |
| 633 | 456 return NGX_OK; |
| 457 } | |
| 458 | |
| 459 size = r->header_in->last - r->header_in->pos; | |
| 460 | |
| 461 if (size) { | |
| 462 if (r->headers_in.content_length_n > size) { | |
|
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463 r->header_in->pos += size; |
| 633 | 464 r->headers_in.content_length_n -= size; |
| 465 | |
| 466 } else { | |
| 663 | 467 r->header_in->pos += (size_t) r->headers_in.content_length_n; |
| 633 | 468 r->headers_in.content_length_n = 0; |
| 469 return NGX_OK; | |
| 470 } | |
| 471 } | |
| 472 | |
|
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473 r->read_event_handler = ngx_http_discarded_request_body_handler; |
| 633 | 474 |
|
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475 if (ngx_handle_read_event(rev, 0) != NGX_OK) { |
| 633 | 476 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 477 } | |
| 478 | |
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479 if (ngx_http_read_discarded_request_body(r) == NGX_OK) { |
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480 r->lingering_close = 0; |
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481 |
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482 } else { |
|
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483 r->count++; |
|
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484 r->discard_body = 1; |
|
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485 } |
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486 |
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487 return NGX_OK; |
| 633 | 488 } |
| 489 | |
| 490 | |
|
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491 void |
|
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492 ngx_http_discarded_request_body_handler(ngx_http_request_t *r) |
| 633 | 493 { |
|
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494 ngx_int_t rc; |
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495 ngx_msec_t timer; |
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496 ngx_event_t *rev; |
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497 ngx_connection_t *c; |
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498 ngx_http_core_loc_conf_t *clcf; |
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499 |
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500 c = r->connection; |
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501 rev = c->read; |
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502 |
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503 if (rev->timedout) { |
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504 c->timedout = 1; |
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505 c->error = 1; |
|
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506 ngx_http_finalize_request(r, NGX_ERROR); |
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507 return; |
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508 } |
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509 |
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510 if (r->lingering_time) { |
| 1640 | 511 timer = (ngx_msec_t) (r->lingering_time - ngx_time()); |
|
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512 |
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513 if (timer <= 0) { |
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514 r->discard_body = 0; |
|
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515 r->lingering_close = 0; |
|
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516 ngx_http_finalize_request(r, NGX_ERROR); |
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517 return; |
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518 } |
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519 |
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520 } else { |
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521 timer = 0; |
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522 } |
| 633 | 523 |
|
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524 rc = ngx_http_read_discarded_request_body(r); |
| 633 | 525 |
|
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526 if (rc == NGX_OK) { |
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527 r->discard_body = 0; |
|
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528 r->lingering_close = 0; |
|
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529 ngx_http_finalize_request(r, NGX_DONE); |
|
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530 return; |
| 633 | 531 } |
| 532 | |
|
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533 /* rc == NGX_AGAIN */ |
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534 |
|
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535 if (ngx_handle_read_event(rev, 0) != NGX_OK) { |
| 1456 | 536 c->error = 1; |
|
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537 ngx_http_finalize_request(r, NGX_ERROR); |
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538 return; |
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539 } |
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540 |
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541 if (timer) { |
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542 |
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543 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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544 |
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545 timer *= 1000; |
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546 |
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547 if (timer > clcf->lingering_timeout) { |
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548 timer = clcf->lingering_timeout; |
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549 } |
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550 |
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551 ngx_add_timer(rev, timer); |
| 633 | 552 } |
| 553 } | |
| 554 | |
| 555 | |
| 556 static ngx_int_t | |
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557 ngx_http_read_discarded_request_body(ngx_http_request_t *r) |
| 633 | 558 { |
| 663 | 559 size_t size; |
| 560 ssize_t n; | |
| 633 | 561 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE]; |
| 562 | |
| 563 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 564 "http read discarded body"); | |
| 565 | |
| 3162 | 566 for ( ;; ) { |
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567 if (r->headers_in.content_length_n == 0) { |
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568 r->read_event_handler = ngx_http_block_reading; |
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569 return NGX_OK; |
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570 } |
| 633 | 571 |
| 3162 | 572 if (!r->connection->read->ready) { |
| 573 return NGX_AGAIN; | |
| 574 } | |
| 575 | |
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576 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ? |
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577 NGX_HTTP_DISCARD_BUFFER_SIZE: |
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578 (size_t) r->headers_in.content_length_n; |
| 633 | 579 |
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580 n = r->connection->recv(r->connection, buffer, size); |
| 633 | 581 |
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582 if (n == NGX_ERROR) { |
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583 r->connection->error = 1; |
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584 return NGX_OK; |
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585 } |
| 633 | 586 |
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587 if (n == NGX_AGAIN) { |
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588 return NGX_AGAIN; |
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589 } |
| 633 | 590 |
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591 if (n == 0) { |
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592 return NGX_OK; |
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593 } |
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594 |
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595 r->headers_in.content_length_n -= n; |
| 3162 | 596 } |
| 633 | 597 } |
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598 |
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599 |
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600 static ngx_int_t |
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601 ngx_http_test_expect(ngx_http_request_t *r) |
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602 { |
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603 ngx_int_t n; |
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604 ngx_str_t *expect; |
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605 |
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606 if (r->expect_tested |
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607 || r->headers_in.expect == NULL |
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608 || r->http_version < NGX_HTTP_VERSION_11) |
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609 { |
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610 return NGX_OK; |
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611 } |
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612 |
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613 r->expect_tested = 1; |
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614 |
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615 expect = &r->headers_in.expect->value; |
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616 |
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617 if (expect->len != sizeof("100-continue") - 1 |
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618 || ngx_strncasecmp(expect->data, (u_char *) "100-continue", |
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619 sizeof("100-continue") - 1) |
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620 != 0) |
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621 { |
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622 return NGX_OK; |
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623 } |
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624 |
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625 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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626 "send 100 Continue"); |
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627 |
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628 n = r->connection->send(r->connection, |
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629 (u_char *) "HTTP/1.1 100 Continue" CRLF CRLF, |
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630 sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1); |
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631 |
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632 if (n == sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1) { |
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633 return NGX_OK; |
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634 } |
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635 |
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636 /* we assume that such small packet should be send successfully */ |
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637 |
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638 return NGX_ERROR; |
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639 } |