Mercurial > hg > nginx-quic
annotate src/http/ngx_http_request_body.c @ 3006:95972b9e790b
ngx_http_upstream_create() to cleanup the previous upstream after
internal redirect
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 27 Jul 2009 13:25:29 +0000 |
parents | 26d9d4a41e91 |
children | 67254117b774 4edce2b6b285 |
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 void ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r); |
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17 static ngx_int_t ngx_http_read_discarded_request_body(ngx_http_request_t *r); |
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18 static ngx_int_t ngx_http_test_expect(ngx_http_request_t *r); |
633 | 19 |
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20 |
479 | 21 /* |
22 * on completion ngx_http_read_client_request_body() adds to | |
23 * r->request_body->bufs one or two bufs: | |
24 * *) one memory buf that was preread in r->header_in; | |
25 * *) one memory or file buf that contains the rest of the body | |
26 */ | |
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27 |
501 | 28 ngx_int_t |
29 ngx_http_read_client_request_body(ngx_http_request_t *r, | |
30 ngx_http_client_body_handler_pt post_handler) | |
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31 { |
663 | 32 size_t preread; |
33 ssize_t size; | |
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34 ngx_buf_t *b; |
633 | 35 ngx_chain_t *cl, **next; |
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36 ngx_temp_file_t *tf; |
479 | 37 ngx_http_request_body_t *rb; |
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38 ngx_http_core_loc_conf_t *clcf; |
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39 |
537 | 40 if (r->request_body || r->discard_body) { |
509 | 41 post_handler(r); |
42 return NGX_OK; | |
43 } | |
44 | |
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45 if (ngx_http_test_expect(r) != NGX_OK) { |
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46 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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47 } |
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48 |
501 | 49 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t)); |
50 if (rb == NULL) { | |
479 | 51 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
52 } | |
53 | |
54 r->request_body = rb; | |
55 | |
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56 if (r->headers_in.content_length_n < 0) { |
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57 post_handler(r); |
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58 return NGX_OK; |
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59 } |
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60 |
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61 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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62 |
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63 if (r->headers_in.content_length_n == 0) { |
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64 |
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65 if (r->request_body_in_file_only) { |
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66 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)); |
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67 if (tf == NULL) { |
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68 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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69 } |
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70 |
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71 tf->file.fd = NGX_INVALID_FILE; |
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72 tf->file.log = r->connection->log; |
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73 tf->path = clcf->client_body_temp_path; |
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74 tf->pool = r->pool; |
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75 tf->warn = "a client request body is buffered to a temporary file"; |
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76 tf->log_level = r->request_body_file_log_level; |
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77 tf->persistent = r->request_body_in_persistent_file; |
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78 tf->clean = r->request_body_in_clean_file; |
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79 |
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80 if (r->request_body_file_group_access) { |
1046 | 81 tf->access = 0660; |
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82 } |
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83 |
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84 rb->temp_file = tf; |
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85 |
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86 if (ngx_create_temp_file(&tf->file, tf->path, tf->pool, |
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87 tf->persistent, tf->clean, tf->access) |
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88 != NGX_OK) |
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89 { |
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90 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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91 } |
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92 } |
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93 |
479 | 94 post_handler(r); |
1290 | 95 |
479 | 96 return NGX_OK; |
97 } | |
98 | |
99 rb->post_handler = post_handler; | |
100 | |
101 /* | |
102 * set by ngx_pcalloc(): | |
103 * | |
104 * rb->bufs = NULL; | |
105 * rb->buf = NULL; | |
106 * rb->rest = 0; | |
107 */ | |
108 | |
633 | 109 preread = r->header_in->last - r->header_in->pos; |
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110 |
633 | 111 if (preread) { |
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112 |
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113 /* there is the pre-read part of the request body */ |
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114 |
633 | 115 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
116 "http client request body preread %uz", preread); | |
117 | |
501 | 118 b = ngx_calloc_buf(r->pool); |
119 if (b == NULL) { | |
479 | 120 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
121 } | |
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122 |
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123 b->temporary = 1; |
633 | 124 b->start = r->header_in->pos; |
125 b->pos = r->header_in->pos; | |
126 b->last = r->header_in->last; | |
127 b->end = r->header_in->end; | |
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128 |
501 | 129 rb->bufs = ngx_alloc_chain_link(r->pool); |
130 if (rb->bufs == NULL) { | |
479 | 131 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
132 } | |
133 | |
134 rb->bufs->buf = b; | |
135 rb->bufs->next = NULL; | |
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136 |
667 | 137 rb->buf = b; |
138 | |
665 | 139 if ((off_t) preread >= r->headers_in.content_length_n) { |
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140 |
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141 /* the whole request body was pre-read */ |
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142 |
663 | 143 r->header_in->pos += (size_t) r->headers_in.content_length_n; |
475 | 144 r->request_length += r->headers_in.content_length_n; |
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145 |
633 | 146 if (r->request_body_in_file_only) { |
147 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) { | |
148 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
149 } | |
150 } | |
151 | |
479 | 152 post_handler(r); |
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153 |
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154 return NGX_OK; |
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155 } |
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156 |
633 | 157 /* |
158 * to not consider the body as pipelined request in | |
159 * ngx_http_set_keepalive() | |
160 */ | |
162
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161 r->header_in->pos = r->header_in->last; |
633 | 162 |
163 r->request_length += preread; | |
164 | |
165 rb->rest = r->headers_in.content_length_n - preread; | |
166 | |
665 | 167 if (rb->rest <= (off_t) (b->end - b->last)) { |
633 | 168 |
169 /* the whole request body may be placed in r->header_in */ | |
170 | |
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171 rb->to_write = rb->bufs; |
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172 |
633 | 173 r->read_event_handler = ngx_http_read_client_request_body_handler; |
174 | |
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175 return ngx_http_do_read_client_request_body(r); |
633 | 176 } |
177 | |
178 next = &rb->bufs->next; | |
179 | |
180 } else { | |
181 b = NULL; | |
182 rb->rest = r->headers_in.content_length_n; | |
183 next = &rb->bufs; | |
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184 } |
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185 |
633 | 186 size = clcf->client_body_buffer_size; |
187 size += size >> 2; | |
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188 |
663 | 189 if (rb->rest < size) { |
190 size = (ssize_t) rb->rest; | |
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191 |
633 | 192 if (r->request_body_in_single_buf) { |
193 size += preread; | |
194 } | |
195 | |
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196 } else { |
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197 size = clcf->client_body_buffer_size; |
633 | 198 |
199 /* disable copying buffer for r->request_body_in_single_buf */ | |
200 b = NULL; | |
160
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201 } |
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202 |
501 | 203 rb->buf = ngx_create_temp_buf(r->pool, size); |
204 if (rb->buf == NULL) { | |
479 | 205 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
206 } | |
160
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207 |
501 | 208 cl = ngx_alloc_chain_link(r->pool); |
209 if (cl == NULL) { | |
479 | 210 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
211 } | |
160
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212 |
479 | 213 cl->buf = rb->buf; |
214 cl->next = NULL; | |
215 | |
633 | 216 if (b && r->request_body_in_single_buf) { |
217 size = b->last - b->pos; | |
218 ngx_memcpy(rb->buf->pos, b->pos, size); | |
219 rb->buf->last += size; | |
220 | |
221 next = &rb->bufs; | |
222 } | |
223 | |
224 *next = cl; | |
225 | |
226 if (r->request_body_in_file_only || r->request_body_in_single_buf) { | |
227 rb->to_write = rb->bufs; | |
160
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228 |
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229 } else { |
633 | 230 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs; |
160
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231 } |
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232 |
509 | 233 r->read_event_handler = ngx_http_read_client_request_body_handler; |
82
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234 |
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235 return ngx_http_do_read_client_request_body(r); |
82
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236 } |
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237 |
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238 |
501 | 239 static void |
509 | 240 ngx_http_read_client_request_body_handler(ngx_http_request_t *r) |
82
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241 { |
509 | 242 ngx_int_t rc; |
293
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243 |
509 | 244 if (r->connection->read->timedout) { |
577 | 245 r->connection->timedout = 1; |
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246 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT); |
299
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247 return; |
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248 } |
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249 |
509 | 250 rc = ngx_http_do_read_client_request_body(r); |
293
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251 |
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252 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { |
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253 ngx_http_finalize_request(r, rc); |
293
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254 } |
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255 } |
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256 |
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257 |
501 | 258 static ngx_int_t |
509 | 259 ngx_http_do_read_client_request_body(ngx_http_request_t *r) |
293
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260 { |
290
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261 size_t size; |
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262 ssize_t n; |
343
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263 ngx_buf_t *b; |
509 | 264 ngx_connection_t *c; |
479 | 265 ngx_http_request_body_t *rb; |
162
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266 ngx_http_core_loc_conf_t *clcf; |
82
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267 |
509 | 268 c = r->connection; |
479 | 269 rb = r->request_body; |
82
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270 |
292
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271 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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272 "http read client request body"); |
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273 |
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274 for ( ;; ) { |
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275 for ( ;; ) { |
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276 if (rb->buf->last == rb->buf->end) { |
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277 |
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278 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) { |
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279 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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280 } |
479 | 281 |
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282 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs; |
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283 rb->buf->last = rb->buf->start; |
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284 } |
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285 |
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286 size = rb->buf->end - rb->buf->last; |
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287 |
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288 if ((off_t) size > rb->rest) { |
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289 size = (size_t) rb->rest; |
292
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290 } |
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291 |
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292 n = c->recv(c, rb->buf->last, size); |
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293 |
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294 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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295 "http client request body recv %z", n); |
82
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296 |
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297 if (n == NGX_AGAIN) { |
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298 break; |
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299 } |
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300 |
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301 if (n == 0) { |
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302 ngx_log_error(NGX_LOG_INFO, c->log, 0, |
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303 "client closed prematurely connection"); |
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304 } |
292
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305 |
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306 if (n == 0 || n == NGX_ERROR) { |
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307 c->error = 1; |
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308 return NGX_HTTP_BAD_REQUEST; |
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309 } |
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310 |
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311 rb->buf->last += n; |
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312 rb->rest -= n; |
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313 r->request_length += n; |
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314 |
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315 if (rb->rest == 0) { |
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316 break; |
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317 } |
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318 |
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319 if (rb->buf->last < rb->buf->end) { |
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320 break; |
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321 } |
292
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322 } |
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323 |
293
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324 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
1112 | 325 "http client request body rest %O", rb->rest); |
292
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326 |
479 | 327 if (rb->rest == 0) { |
294
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328 break; |
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329 } |
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330 |
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331 if (!c->read->ready) { |
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332 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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333 ngx_add_timer(c->read, clcf->client_body_timeout); |
293
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334 |
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335 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
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336 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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337 } |
573 | 338 |
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339 return NGX_AGAIN; |
573 | 340 } |
82
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341 } |
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342 |
573 | 343 if (c->read->timer_set) { |
344 ngx_del_timer(c->read); | |
345 } | |
346 | |
633 | 347 if (rb->temp_file || r->request_body_in_file_only) { |
82
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348 |
160
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349 /* save the last part */ |
479 | 350 |
633 | 351 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) { |
293
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352 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
162
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353 } |
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354 |
501 | 355 b = ngx_calloc_buf(r->pool); |
356 if (b == NULL) { | |
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357 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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358 } |
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359 |
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360 b->in_file = 1; |
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361 b->file_pos = 0; |
479 | 362 b->file_last = rb->temp_file->file.offset; |
363 b->file = &rb->temp_file->file; | |
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364 |
479 | 365 if (rb->bufs->next) { |
366 rb->bufs->next->buf = b; | |
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367 |
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368 } else { |
479 | 369 rb->bufs->buf = b; |
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370 } |
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371 } |
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372 |
633 | 373 if (r->request_body_in_file_only && rb->bufs->next) { |
374 rb->bufs = rb->bufs->next; | |
375 } | |
376 | |
479 | 377 rb->post_handler(r); |
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378 |
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379 return NGX_OK; |
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380 } |
633 | 381 |
382 | |
383 static ngx_int_t | |
384 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body) | |
385 { | |
386 ssize_t n; | |
387 ngx_temp_file_t *tf; | |
388 ngx_http_request_body_t *rb; | |
389 ngx_http_core_loc_conf_t *clcf; | |
390 | |
391 rb = r->request_body; | |
392 | |
393 if (rb->temp_file == NULL) { | |
394 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)); | |
395 if (tf == NULL) { | |
396 return NGX_ERROR; | |
397 } | |
398 | |
399 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
400 | |
401 tf->file.fd = NGX_INVALID_FILE; | |
402 tf->file.log = r->connection->log; | |
403 tf->path = clcf->client_body_temp_path; | |
404 tf->pool = r->pool; | |
405 tf->warn = "a client request body is buffered to a temporary file"; | |
637 | 406 tf->log_level = r->request_body_file_log_level; |
633 | 407 tf->persistent = r->request_body_in_persistent_file; |
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408 tf->clean = r->request_body_in_clean_file; |
633 | 409 |
410 if (r->request_body_file_group_access) { | |
1046 | 411 tf->access = 0660; |
633 | 412 } |
413 | |
414 rb->temp_file = tf; | |
415 } | |
416 | |
417 n = ngx_write_chain_to_temp_file(rb->temp_file, body); | |
418 | |
419 /* TODO: n == 0 or not complete and level event */ | |
420 | |
421 if (n == NGX_ERROR) { | |
422 return NGX_ERROR; | |
423 } | |
424 | |
425 rb->temp_file->offset += n; | |
426 | |
427 return NGX_OK; | |
428 } | |
429 | |
430 | |
431 ngx_int_t | |
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432 ngx_http_discard_request_body(ngx_http_request_t *r) |
633 | 433 { |
434 ssize_t size; | |
435 ngx_event_t *rev; | |
436 | |
673 | 437 if (r != r->main || r->discard_body) { |
633 | 438 return NGX_OK; |
439 } | |
440 | |
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441 if (ngx_http_test_expect(r) != NGX_OK) { |
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442 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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443 } |
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444 |
633 | 445 rev = r->connection->read; |
446 | |
447 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body"); | |
448 | |
449 if (rev->timer_set) { | |
450 ngx_del_timer(rev); | |
451 } | |
452 | |
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453 if (r->headers_in.content_length_n <= 0 || r->request_body) { |
633 | 454 return NGX_OK; |
455 } | |
456 | |
457 size = r->header_in->last - r->header_in->pos; | |
458 | |
459 if (size) { | |
460 if (r->headers_in.content_length_n > size) { | |
461 r->headers_in.content_length_n -= size; | |
462 | |
463 } else { | |
663 | 464 r->header_in->pos += (size_t) r->headers_in.content_length_n; |
633 | 465 r->headers_in.content_length_n = 0; |
466 return NGX_OK; | |
467 } | |
468 } | |
469 | |
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470 r->discard_body = 1; |
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471 |
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472 r->read_event_handler = ngx_http_read_discarded_request_body_handler; |
633 | 473 |
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474 if (ngx_handle_read_event(rev, 0) != NGX_OK) { |
633 | 475 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
476 } | |
477 | |
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478 (void) ngx_http_read_discarded_request_body(r); |
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479 |
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480 return NGX_OK; |
633 | 481 } |
482 | |
483 | |
484 static void | |
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485 ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r) |
633 | 486 { |
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487 ngx_int_t rc; |
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488 ngx_msec_t timer; |
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489 ngx_event_t *rev; |
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490 ngx_connection_t *c; |
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491 ngx_http_core_loc_conf_t *clcf; |
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492 |
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493 c = r->connection; |
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494 rev = c->read; |
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495 |
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496 if (rev->timedout) { |
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497 c->timedout = 1; |
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498 c->error = 1; |
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499 ngx_http_finalize_request(r, 0); |
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500 return; |
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501 } |
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502 |
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503 if (r->lingering_time) { |
1640 | 504 timer = (ngx_msec_t) (r->lingering_time - ngx_time()); |
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505 |
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506 if (timer <= 0) { |
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507 r->discard_body = 0; |
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508 ngx_http_finalize_request(r, 0); |
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509 return; |
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510 } |
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511 |
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512 } else { |
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513 timer = 0; |
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514 } |
633 | 515 |
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516 rc = ngx_http_read_discarded_request_body(r); |
633 | 517 |
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518 if (rc == NGX_OK) { |
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519 |
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520 r->discard_body = 0; |
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521 |
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522 if (r->done) { |
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523 ngx_http_finalize_request(r, 0); |
633 | 524 } |
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525 |
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526 return; |
633 | 527 } |
528 | |
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529 /* rc == NGX_AGAIN */ |
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530 |
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531 if (ngx_handle_read_event(rev, 0) != NGX_OK) { |
1456 | 532 c->error = 1; |
633 | 533 ngx_http_finalize_request(r, rc); |
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534 return; |
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535 } |
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536 |
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537 if (timer) { |
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538 |
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539 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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540 |
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541 timer *= 1000; |
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542 |
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543 if (timer > clcf->lingering_timeout) { |
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544 timer = clcf->lingering_timeout; |
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545 } |
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546 |
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547 ngx_add_timer(rev, timer); |
633 | 548 } |
549 } | |
550 | |
551 | |
552 static ngx_int_t | |
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553 ngx_http_read_discarded_request_body(ngx_http_request_t *r) |
633 | 554 { |
663 | 555 size_t size; |
556 ssize_t n; | |
633 | 557 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE]; |
558 | |
559 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
560 "http read discarded body"); | |
561 | |
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562 do { |
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563 if (r->headers_in.content_length_n == 0) { |
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564 r->read_event_handler = ngx_http_block_reading; |
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565 return NGX_OK; |
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566 } |
633 | 567 |
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568 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ? |
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569 NGX_HTTP_DISCARD_BUFFER_SIZE: |
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570 (size_t) r->headers_in.content_length_n; |
633 | 571 |
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572 n = r->connection->recv(r->connection, buffer, size); |
633 | 573 |
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574 if (n == NGX_ERROR) { |
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575 r->connection->error = 1; |
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576 return NGX_OK; |
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577 } |
633 | 578 |
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579 if (n == NGX_AGAIN) { |
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580 return NGX_AGAIN; |
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581 } |
633 | 582 |
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583 if (n == 0) { |
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584 return NGX_OK; |
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585 } |
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586 |
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587 r->headers_in.content_length_n -= n; |
633 | 588 |
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589 } while (r->connection->read->ready); |
633 | 590 |
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591 return NGX_AGAIN; |
633 | 592 } |
2436
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593 |
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594 |
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595 static ngx_int_t |
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596 ngx_http_test_expect(ngx_http_request_t *r) |
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597 { |
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598 ngx_int_t n; |
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599 ngx_str_t *expect; |
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600 |
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601 if (r->expect_tested |
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602 || r->headers_in.expect == NULL |
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603 || r->http_version < NGX_HTTP_VERSION_11) |
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604 { |
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605 return NGX_OK; |
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606 } |
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607 |
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608 r->expect_tested = 1; |
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609 |
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610 expect = &r->headers_in.expect->value; |
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611 |
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612 if (expect->len != sizeof("100-continue") - 1 |
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613 || ngx_strncasecmp(expect->data, (u_char *) "100-continue", |
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614 sizeof("100-continue") - 1) |
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615 != 0) |
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616 { |
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617 return NGX_OK; |
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618 } |
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619 |
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620 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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621 "send 100 Continue"); |
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622 |
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623 n = r->connection->send(r->connection, |
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624 (u_char *) "HTTP/1.1 100 Continue" CRLF CRLF, |
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625 sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1); |
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626 |
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627 if (n == sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1) { |
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628 return NGX_OK; |
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629 } |
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630 |
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631 /* we assume that such small packet should be send successfully */ |
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632 |
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633 return NGX_ERROR; |
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634 } |