Mercurial > hg > nginx
annotate src/http/modules/ngx_http_image_filter_module.c @ 3744:77b18d36d123
zero fcn->updating after node allocation
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 04 Aug 2010 13:34:23 +0000 |
| parents | 1a728cc43bb1 |
| children | f5fa9d2e09b6 |
| rev | line source |
|---|---|
| 2788 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
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10 |
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11 #include <gd.h> |
| 2788 | 12 |
| 13 | |
| 14 #define NGX_HTTP_IMAGE_OFF 0 | |
| 15 #define NGX_HTTP_IMAGE_TEST 1 | |
| 16 #define NGX_HTTP_IMAGE_SIZE 2 | |
| 17 #define NGX_HTTP_IMAGE_RESIZE 3 | |
| 18 #define NGX_HTTP_IMAGE_CROP 4 | |
| 19 | |
| 20 | |
| 21 #define NGX_HTTP_IMAGE_START 0 | |
| 22 #define NGX_HTTP_IMAGE_READ 1 | |
| 23 #define NGX_HTTP_IMAGE_PROCESS 2 | |
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24 #define NGX_HTTP_IMAGE_PASS 3 |
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25 #define NGX_HTTP_IMAGE_DONE 4 |
| 2788 | 26 |
| 27 | |
| 28 #define NGX_HTTP_IMAGE_NONE 0 | |
| 29 #define NGX_HTTP_IMAGE_JPEG 1 | |
| 30 #define NGX_HTTP_IMAGE_GIF 2 | |
| 31 #define NGX_HTTP_IMAGE_PNG 3 | |
| 32 | |
| 33 | |
| 34 #define NGX_HTTP_IMAGE_BUFFERED 0x08 | |
| 35 | |
| 36 | |
| 37 typedef struct { | |
| 38 ngx_uint_t filter; | |
| 39 ngx_uint_t width; | |
| 40 ngx_uint_t height; | |
| 2848 | 41 ngx_int_t jpeg_quality; |
| 2788 | 42 |
| 3134 | 43 ngx_flag_t transparency; |
| 44 | |
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45 ngx_http_complex_value_t *wcv; |
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46 ngx_http_complex_value_t *hcv; |
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47 |
| 2788 | 48 size_t buffer_size; |
| 49 } ngx_http_image_filter_conf_t; | |
| 50 | |
| 51 | |
| 52 typedef struct { | |
| 53 u_char *image; | |
| 54 u_char *last; | |
| 55 | |
| 56 size_t length; | |
| 57 | |
| 58 ngx_uint_t width; | |
| 59 ngx_uint_t height; | |
| 60 | |
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61 ngx_uint_t max_width; |
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62 ngx_uint_t max_height; |
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63 |
| 2788 | 64 ngx_uint_t phase; |
| 65 ngx_uint_t type; | |
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66 ngx_uint_t force; |
| 2788 | 67 } ngx_http_image_filter_ctx_t; |
| 68 | |
| 69 | |
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70 static ngx_int_t ngx_http_image_send(ngx_http_request_t *r, |
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71 ngx_http_image_filter_ctx_t *ctx, ngx_chain_t *in); |
| 2788 | 72 static ngx_uint_t ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in); |
| 73 static ngx_int_t ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in); | |
| 74 static ngx_buf_t *ngx_http_image_process(ngx_http_request_t *r); | |
| 75 static ngx_buf_t *ngx_http_image_json(ngx_http_request_t *r, | |
| 76 ngx_http_image_filter_ctx_t *ctx); | |
| 77 static ngx_buf_t *ngx_http_image_asis(ngx_http_request_t *r, | |
| 78 ngx_http_image_filter_ctx_t *ctx); | |
| 79 static void ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b); | |
| 80 static ngx_int_t ngx_http_image_size(ngx_http_request_t *r, | |
| 81 ngx_http_image_filter_ctx_t *ctx); | |
| 82 | |
| 83 static ngx_buf_t *ngx_http_image_resize(ngx_http_request_t *r, | |
| 84 ngx_http_image_filter_ctx_t *ctx); | |
| 85 static gdImagePtr ngx_http_image_source(ngx_http_request_t *r, | |
| 86 ngx_http_image_filter_ctx_t *ctx); | |
| 87 static gdImagePtr ngx_http_image_new(ngx_http_request_t *r, int w, int h, | |
| 88 int colors); | |
| 89 static u_char *ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, | |
| 90 gdImagePtr img, int *size); | |
| 91 static void ngx_http_image_cleanup(void *data); | |
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92 static ngx_uint_t ngx_http_image_filter_get_value(ngx_http_request_t *r, |
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93 ngx_http_complex_value_t *cv, ngx_uint_t v); |
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94 static ngx_uint_t ngx_http_image_filter_value(ngx_str_t *value); |
| 2788 | 95 |
| 96 | |
| 97 static void *ngx_http_image_filter_create_conf(ngx_conf_t *cf); | |
| 98 static char *ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, | |
| 99 void *child); | |
| 100 static char *ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 101 void *conf); | |
| 102 static ngx_int_t ngx_http_image_filter_init(ngx_conf_t *cf); | |
| 103 | |
| 104 | |
| 105 static ngx_command_t ngx_http_image_filter_commands[] = { | |
| 106 | |
| 107 { ngx_string("image_filter"), | |
| 108 NGX_HTTP_LOC_CONF|NGX_CONF_TAKE13, | |
| 109 ngx_http_image_filter, | |
| 110 NGX_HTTP_LOC_CONF_OFFSET, | |
| 111 0, | |
| 112 NULL }, | |
| 113 | |
| 2848 | 114 { ngx_string("image_filter_jpeg_quality"), |
| 115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 116 ngx_conf_set_num_slot, | |
| 117 NGX_HTTP_LOC_CONF_OFFSET, | |
| 118 offsetof(ngx_http_image_filter_conf_t, jpeg_quality), | |
| 119 NULL }, | |
| 120 | |
| 3134 | 121 { ngx_string("image_filter_transparency"), |
| 122 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
| 123 ngx_conf_set_flag_slot, | |
| 124 NGX_HTTP_LOC_CONF_OFFSET, | |
| 125 offsetof(ngx_http_image_filter_conf_t, transparency), | |
| 126 NULL }, | |
| 127 | |
| 2788 | 128 { ngx_string("image_filter_buffer"), |
| 129 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 130 ngx_conf_set_size_slot, | |
| 131 NGX_HTTP_LOC_CONF_OFFSET, | |
| 132 offsetof(ngx_http_image_filter_conf_t, buffer_size), | |
| 133 NULL }, | |
| 134 | |
| 135 ngx_null_command | |
| 136 }; | |
| 137 | |
| 138 | |
| 139 static ngx_http_module_t ngx_http_image_filter_module_ctx = { | |
| 140 NULL, /* preconfiguration */ | |
| 141 ngx_http_image_filter_init, /* postconfiguration */ | |
| 142 | |
| 143 NULL, /* create main configuration */ | |
| 144 NULL, /* init main configuration */ | |
| 145 | |
| 146 NULL, /* create server configuration */ | |
| 147 NULL, /* merge server configuration */ | |
| 148 | |
| 149 ngx_http_image_filter_create_conf, /* create location configuration */ | |
| 150 ngx_http_image_filter_merge_conf /* merge location configuration */ | |
| 151 }; | |
| 152 | |
| 153 | |
| 154 ngx_module_t ngx_http_image_filter_module = { | |
| 155 NGX_MODULE_V1, | |
| 156 &ngx_http_image_filter_module_ctx, /* module context */ | |
| 157 ngx_http_image_filter_commands, /* module directives */ | |
| 158 NGX_HTTP_MODULE, /* module type */ | |
| 159 NULL, /* init master */ | |
| 160 NULL, /* init module */ | |
| 161 NULL, /* init process */ | |
| 162 NULL, /* init thread */ | |
| 163 NULL, /* exit thread */ | |
| 164 NULL, /* exit process */ | |
| 165 NULL, /* exit master */ | |
| 166 NGX_MODULE_V1_PADDING | |
| 167 }; | |
| 168 | |
| 169 | |
| 170 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 171 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 172 | |
| 173 | |
| 174 static ngx_str_t ngx_http_image_types[] = { | |
| 175 ngx_string("image/jpeg"), | |
| 176 ngx_string("image/gif"), | |
| 177 ngx_string("image/png") | |
| 178 }; | |
| 179 | |
| 180 | |
| 181 static ngx_int_t | |
| 182 ngx_http_image_header_filter(ngx_http_request_t *r) | |
| 183 { | |
| 184 off_t len; | |
| 185 ngx_http_image_filter_ctx_t *ctx; | |
| 186 ngx_http_image_filter_conf_t *conf; | |
| 187 | |
| 188 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { | |
| 189 return ngx_http_next_header_filter(r); | |
| 190 } | |
| 191 | |
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192 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); |
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193 |
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194 if (ctx) { |
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195 ngx_http_set_ctx(r, NULL, ngx_http_image_filter_module); |
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196 return ngx_http_next_header_filter(r); |
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197 } |
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198 |
| 2788 | 199 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); |
| 200 | |
| 201 if (conf->filter == NGX_HTTP_IMAGE_OFF) { | |
| 202 return ngx_http_next_header_filter(r); | |
| 203 } | |
| 204 | |
| 205 if (r->headers_out.content_type.len | |
| 206 >= sizeof("multipart/x-mixed-replace") - 1 | |
| 207 && ngx_strncasecmp(r->headers_out.content_type.data, | |
| 208 (u_char *) "multipart/x-mixed-replace", | |
| 209 sizeof("multipart/x-mixed-replace") - 1) | |
| 210 == 0) | |
| 211 { | |
| 212 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 213 "image filter: multipart/x-mixed-replace response"); | |
| 214 | |
| 215 return NGX_ERROR; | |
| 216 } | |
| 217 | |
| 218 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_image_filter_ctx_t)); | |
| 219 if (ctx == NULL) { | |
| 220 return NGX_ERROR; | |
| 221 } | |
| 222 | |
| 223 ngx_http_set_ctx(r, ctx, ngx_http_image_filter_module); | |
| 224 | |
| 225 len = r->headers_out.content_length_n; | |
| 226 | |
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227 if (len != -1 && len > (off_t) conf->buffer_size) { |
| 2788 | 228 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| 229 "image filter: too big response: %O", len); | |
| 230 | |
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231 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE; |
| 2788 | 232 } |
| 233 | |
| 234 if (len == -1) { | |
| 235 ctx->length = conf->buffer_size; | |
| 236 | |
| 237 } else { | |
| 238 ctx->length = (size_t) len; | |
| 239 } | |
| 240 | |
| 241 if (r->headers_out.refresh) { | |
| 242 r->headers_out.refresh->hash = 0; | |
| 243 } | |
| 244 | |
| 245 r->main_filter_need_in_memory = 1; | |
| 246 r->allow_ranges = 0; | |
| 247 | |
| 248 return NGX_OK; | |
| 249 } | |
| 250 | |
| 251 | |
| 252 static ngx_int_t | |
| 253 ngx_http_image_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 254 { | |
| 255 ngx_int_t rc; | |
| 256 ngx_str_t *ct; | |
| 257 ngx_chain_t out; | |
| 258 ngx_http_image_filter_ctx_t *ctx; | |
| 259 ngx_http_image_filter_conf_t *conf; | |
| 260 | |
| 261 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "image filter"); | |
| 262 | |
| 263 if (in == NULL) { | |
| 264 return ngx_http_next_body_filter(r, in); | |
| 265 } | |
| 266 | |
| 267 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); | |
| 268 | |
| 269 if (ctx == NULL) { | |
| 270 return ngx_http_next_body_filter(r, in); | |
| 271 } | |
| 272 | |
| 273 switch (ctx->phase) { | |
| 274 | |
| 275 case NGX_HTTP_IMAGE_START: | |
| 276 | |
| 277 ctx->type = ngx_http_image_test(r, in); | |
| 278 | |
| 279 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); | |
| 280 | |
| 281 if (ctx->type == NGX_HTTP_IMAGE_NONE) { | |
| 282 | |
| 283 if (conf->filter == NGX_HTTP_IMAGE_SIZE) { | |
| 284 out.buf = ngx_http_image_json(r, NULL); | |
| 285 | |
| 286 if (out.buf) { | |
| 287 out.next = NULL; | |
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288 ctx->phase = NGX_HTTP_IMAGE_DONE; |
| 2788 | 289 |
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290 return ngx_http_image_send(r, ctx, &out); |
| 2788 | 291 } |
| 292 } | |
| 293 | |
| 294 return ngx_http_filter_finalize_request(r, | |
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295 &ngx_http_image_filter_module, |
| 2788 | 296 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE); |
| 297 } | |
| 298 | |
| 299 /* override content type */ | |
| 300 | |
| 301 ct = &ngx_http_image_types[ctx->type - 1]; | |
| 302 r->headers_out.content_type_len = ct->len; | |
| 303 r->headers_out.content_type = *ct; | |
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304 r->headers_out.content_type_lowcase = NULL; |
| 2788 | 305 |
| 306 if (conf->filter == NGX_HTTP_IMAGE_TEST) { | |
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307 ctx->phase = NGX_HTTP_IMAGE_PASS; |
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308 |
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309 return ngx_http_image_send(r, ctx, in); |
| 2788 | 310 } |
| 311 | |
| 312 ctx->phase = NGX_HTTP_IMAGE_READ; | |
| 313 | |
| 314 /* fall through */ | |
| 315 | |
| 316 case NGX_HTTP_IMAGE_READ: | |
| 317 | |
| 318 rc = ngx_http_image_read(r, in); | |
| 319 | |
| 320 if (rc == NGX_AGAIN) { | |
| 321 return NGX_OK; | |
| 322 } | |
| 323 | |
| 324 if (rc == NGX_ERROR) { | |
| 325 return ngx_http_filter_finalize_request(r, | |
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326 &ngx_http_image_filter_module, |
| 2788 | 327 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE); |
| 328 } | |
| 329 | |
| 330 /* fall through */ | |
| 331 | |
| 332 case NGX_HTTP_IMAGE_PROCESS: | |
| 333 | |
| 334 out.buf = ngx_http_image_process(r); | |
| 335 | |
| 336 if (out.buf == NULL) { | |
| 337 return ngx_http_filter_finalize_request(r, | |
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338 &ngx_http_image_filter_module, |
| 2788 | 339 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE); |
| 340 } | |
| 341 | |
| 342 out.next = NULL; | |
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343 ctx->phase = NGX_HTTP_IMAGE_PASS; |
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344 |
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345 return ngx_http_image_send(r, ctx, &out); |
| 2788 | 346 |
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347 case NGX_HTTP_IMAGE_PASS: |
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348 |
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349 return ngx_http_next_body_filter(r, in); |
| 2788 | 350 |
| 351 default: /* NGX_HTTP_IMAGE_DONE */ | |
| 352 | |
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353 rc = ngx_http_next_body_filter(r, NULL); |
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354 |
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355 /* NGX_ERROR resets any pending data */ |
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356 return (rc == NGX_OK) ? NGX_ERROR : rc; |
| 2788 | 357 } |
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358 } |
| 2788 | 359 |
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360 |
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361 static ngx_int_t |
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362 ngx_http_image_send(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx, |
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363 ngx_chain_t *in) |
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364 { |
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365 ngx_int_t rc; |
| 2788 | 366 |
| 367 rc = ngx_http_next_header_filter(r); | |
| 368 | |
| 369 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
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370 return NGX_ERROR; |
| 2788 | 371 } |
| 372 | |
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373 rc = ngx_http_next_body_filter(r, in); |
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374 |
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375 if (ctx->phase == NGX_HTTP_IMAGE_DONE) { |
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376 /* NGX_ERROR resets any pending data */ |
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377 return (rc == NGX_OK) ? NGX_ERROR : rc; |
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378 } |
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379 |
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380 return rc; |
| 2788 | 381 } |
| 382 | |
| 383 | |
| 384 static ngx_uint_t | |
| 385 ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in) | |
| 386 { | |
| 387 u_char *p; | |
| 388 | |
| 389 p = in->buf->pos; | |
| 390 | |
| 391 if (in->buf->last - p < 16) { | |
| 392 return NGX_HTTP_IMAGE_NONE; | |
| 393 } | |
| 394 | |
| 395 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 396 "image filter: \"%c%c\"", p[0], p[1]); | |
| 397 | |
| 398 if (p[0] == 0xff && p[1] == 0xd8) { | |
| 399 | |
| 400 /* JPEG */ | |
| 401 | |
| 402 return NGX_HTTP_IMAGE_JPEG; | |
| 403 | |
| 404 } else if (p[0] == 'G' && p[1] == 'I' && p[2] == 'F' && p[3] == '8' | |
| 2918 | 405 && p[5] == 'a') |
| 2788 | 406 { |
| 2918 | 407 if (p[4] == '9' || p[4] == '7') { |
| 408 /* GIF */ | |
| 409 return NGX_HTTP_IMAGE_GIF; | |
| 410 } | |
| 2788 | 411 |
| 412 } else if (p[0] == 0x89 && p[1] == 'P' && p[2] == 'N' && p[3] == 'G' | |
| 413 && p[4] == 0x0d && p[5] == 0x0a && p[6] == 0x1a && p[7] == 0x0a) | |
| 414 { | |
| 415 /* PNG */ | |
| 416 | |
| 417 return NGX_HTTP_IMAGE_PNG; | |
| 418 } | |
| 419 | |
| 420 return NGX_HTTP_IMAGE_NONE; | |
| 421 } | |
| 422 | |
| 423 | |
| 424 static ngx_int_t | |
| 425 ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in) | |
| 426 { | |
| 427 u_char *p; | |
| 428 size_t size, rest; | |
| 429 ngx_buf_t *b; | |
| 430 ngx_chain_t *cl; | |
| 431 ngx_http_image_filter_ctx_t *ctx; | |
| 432 | |
| 433 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); | |
| 434 | |
| 435 if (ctx->image == NULL) { | |
| 436 ctx->image = ngx_palloc(r->pool, ctx->length); | |
| 437 if (ctx->image == NULL) { | |
| 438 return NGX_ERROR; | |
| 439 } | |
| 440 | |
| 441 ctx->last = ctx->image; | |
| 442 } | |
| 443 | |
| 444 p = ctx->last; | |
| 445 | |
| 446 for (cl = in; cl; cl = cl->next) { | |
| 447 | |
| 448 b = cl->buf; | |
| 449 size = b->last - b->pos; | |
| 450 | |
| 451 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 452 "image buf: %uz", size); | |
| 453 | |
| 454 rest = ctx->image + ctx->length - p; | |
| 455 size = (rest < size) ? rest : size; | |
| 456 | |
| 457 p = ngx_cpymem(p, b->pos, size); | |
| 458 b->pos += size; | |
| 459 | |
| 460 if (b->last_buf) { | |
| 461 ctx->last = p; | |
| 462 return NGX_OK; | |
| 463 } | |
| 464 } | |
| 465 | |
| 466 ctx->last = p; | |
| 467 r->connection->buffered |= NGX_HTTP_IMAGE_BUFFERED; | |
| 468 | |
| 469 return NGX_AGAIN; | |
| 470 } | |
| 471 | |
| 472 | |
| 473 static ngx_buf_t * | |
| 474 ngx_http_image_process(ngx_http_request_t *r) | |
| 475 { | |
| 476 ngx_int_t rc; | |
| 477 ngx_http_image_filter_ctx_t *ctx; | |
| 478 ngx_http_image_filter_conf_t *conf; | |
| 479 | |
| 480 r->connection->buffered &= ~NGX_HTTP_IMAGE_BUFFERED; | |
| 481 | |
| 482 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); | |
| 483 | |
| 484 rc = ngx_http_image_size(r, ctx); | |
| 485 | |
| 486 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); | |
| 487 | |
| 488 if (conf->filter == NGX_HTTP_IMAGE_SIZE) { | |
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489 return ngx_http_image_json(r, rc == NGX_OK ? ctx : NULL); |
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490 } |
| 2788 | 491 |
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492 ctx->max_width = ngx_http_image_filter_get_value(r, conf->wcv, conf->width); |
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493 if (ctx->max_width == 0) { |
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494 return NULL; |
| 2788 | 495 } |
| 496 | |
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497 ctx->max_height = ngx_http_image_filter_get_value(r, conf->hcv, |
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498 conf->height); |
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499 if (ctx->max_height == 0) { |
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500 return NULL; |
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501 } |
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502 |
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503 if (rc == NGX_OK |
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504 && ctx->width <= ctx->max_width |
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505 && ctx->height <= ctx->max_height |
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506 && !ctx->force) |
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507 { |
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508 return ngx_http_image_asis(r, ctx); |
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509 } |
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510 |
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511 return ngx_http_image_resize(r, ctx); |
| 2788 | 512 } |
| 513 | |
| 514 | |
| 515 static ngx_buf_t * | |
| 516 ngx_http_image_json(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 517 { | |
| 518 size_t len; | |
| 519 ngx_buf_t *b; | |
| 520 | |
| 521 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 522 if (b == NULL) { | |
| 523 return NULL; | |
| 524 } | |
| 525 | |
| 526 b->memory = 1; | |
| 527 b->last_buf = 1; | |
| 528 | |
| 529 ngx_http_clean_header(r); | |
| 530 | |
| 531 r->headers_out.status = NGX_HTTP_OK; | |
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532 ngx_str_set(&r->headers_out.content_type, "text/plain"); |
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533 r->headers_out.content_type_lowcase = NULL; |
| 2788 | 534 |
| 535 if (ctx == NULL) { | |
| 536 b->pos = (u_char *) "{}" CRLF; | |
| 537 b->last = b->pos + sizeof("{}" CRLF) - 1; | |
| 538 | |
| 539 ngx_http_image_length(r, b); | |
| 540 | |
| 541 return b; | |
| 542 } | |
| 543 | |
| 544 len = sizeof("{ \"img\" : " | |
| 545 "{ \"width\": , \"height\": , \"type\": \"jpeg\" } }" CRLF) - 1 | |
| 546 + 2 * NGX_SIZE_T_LEN; | |
| 547 | |
| 548 b->pos = ngx_pnalloc(r->pool, len); | |
| 549 if (b->pos == NULL) { | |
| 550 return NULL; | |
| 551 } | |
| 552 | |
| 553 b->last = ngx_sprintf(b->pos, | |
| 554 "{ \"img\" : " | |
| 555 "{ \"width\": %uz," | |
| 556 " \"height\": %uz," | |
| 557 " \"type\": \"%s\" } }" CRLF, | |
| 558 ctx->width, ctx->height, | |
| 559 ngx_http_image_types[ctx->type - 1].data + 6); | |
| 560 | |
| 561 ngx_http_image_length(r, b); | |
| 562 | |
| 563 return b; | |
| 564 } | |
| 565 | |
| 566 | |
| 567 static ngx_buf_t * | |
| 568 ngx_http_image_asis(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 569 { | |
| 570 ngx_buf_t *b; | |
| 571 | |
| 572 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 573 if (b == NULL) { | |
| 574 return NULL; | |
| 575 } | |
| 576 | |
| 577 b->pos = ctx->image; | |
| 578 b->last = ctx->last; | |
| 579 b->memory = 1; | |
| 580 b->last_buf = 1; | |
| 581 | |
| 582 ngx_http_image_length(r, b); | |
| 583 | |
| 584 return b; | |
| 585 } | |
| 586 | |
| 587 | |
| 588 static void | |
| 589 ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b) | |
| 590 { | |
| 591 r->headers_out.content_length_n = b->last - b->pos; | |
| 592 | |
| 593 if (r->headers_out.content_length) { | |
| 594 r->headers_out.content_length->hash = 0; | |
| 595 } | |
| 596 | |
| 597 r->headers_out.content_length = NULL; | |
| 598 } | |
| 599 | |
| 600 | |
| 601 static ngx_int_t | |
| 602 ngx_http_image_size(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 603 { | |
| 604 u_char *p, *last; | |
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605 size_t len, app; |
| 2788 | 606 ngx_uint_t width, height; |
| 607 | |
| 608 p = ctx->image; | |
| 609 | |
| 610 switch (ctx->type) { | |
| 611 | |
| 612 case NGX_HTTP_IMAGE_JPEG: | |
| 613 | |
| 614 p += 2; | |
| 615 last = ctx->image + ctx->length - 10; | |
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616 width = 0; |
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617 height = 0; |
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618 app = 0; |
| 2788 | 619 |
| 620 while (p < last) { | |
| 621 | |
| 622 if (p[0] == 0xff && p[1] != 0xff) { | |
| 623 | |
| 624 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 3393 | 625 "JPEG: %02xd %02xd", p[0], p[1]); |
| 2788 | 626 |
| 627 p++; | |
| 628 | |
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629 if ((*p == 0xc0 || *p == 0xc1 || *p == 0xc2 || *p == 0xc3 |
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630 || *p == 0xc9 || *p == 0xca || *p == 0xcb) |
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631 && (width == 0 || height == 0)) |
| 2788 | 632 { |
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633 width = p[6] * 256 + p[7]; |
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634 height = p[4] * 256 + p[5]; |
| 2788 | 635 } |
| 636 | |
| 637 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 638 "JPEG: %02xd %02xd", p[1], p[2]); | |
| 639 | |
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640 len = p[1] * 256 + p[2]; |
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641 |
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642 if (*p >= 0xe1 && *p <= 0xef) { |
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643 /* application data, e.g., EXIF, Adobe XMP, etc. */ |
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644 app += len; |
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645 } |
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646 |
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647 p += len; |
| 2788 | 648 |
| 649 continue; | |
| 650 } | |
| 651 | |
| 652 p++; | |
| 653 } | |
| 654 | |
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655 if (width == 0 || height == 0) { |
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656 return NGX_DECLINED; |
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657 } |
| 2788 | 658 |
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659 if (ctx->length / 20 < app) { |
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660 /* force conversion if application data consume more than 5% */ |
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661 ctx->force = 1; |
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662 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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663 "app data size: %uz", app); |
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664 } |
| 2788 | 665 |
| 666 break; | |
| 667 | |
| 668 case NGX_HTTP_IMAGE_GIF: | |
| 669 | |
| 670 if (ctx->length < 10) { | |
| 671 return NGX_DECLINED; | |
| 672 } | |
| 673 | |
| 674 width = p[7] * 256 + p[6]; | |
| 675 height = p[9] * 256 + p[8]; | |
| 676 | |
| 677 break; | |
| 678 | |
| 679 case NGX_HTTP_IMAGE_PNG: | |
| 680 | |
| 681 if (ctx->length < 24) { | |
| 682 return NGX_DECLINED; | |
| 683 } | |
| 684 | |
| 685 width = p[18] * 256 + p[19]; | |
| 686 height = p[22] * 256 + p[23]; | |
| 687 | |
| 688 break; | |
| 689 | |
| 690 default: | |
| 691 | |
| 692 return NGX_DECLINED; | |
| 693 } | |
| 694 | |
| 695 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 696 "image size: %d x %d", width, height); | |
| 697 | |
| 698 ctx->width = width; | |
| 699 ctx->height = height; | |
| 700 | |
| 701 return NGX_OK; | |
| 702 } | |
| 703 | |
| 704 | |
| 705 static ngx_buf_t * | |
| 706 ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 707 { | |
| 3134 | 708 int sx, sy, dx, dy, ox, oy, size, |
| 709 colors, palette, transparent, | |
| 710 red, green, blue; | |
| 2788 | 711 u_char *out; |
| 712 ngx_buf_t *b; | |
| 713 ngx_uint_t resize; | |
| 714 gdImagePtr src, dst; | |
| 715 ngx_pool_cleanup_t *cln; | |
| 716 ngx_http_image_filter_conf_t *conf; | |
| 717 | |
| 718 src = ngx_http_image_source(r, ctx); | |
| 719 | |
| 720 if (src == NULL) { | |
| 721 return NULL; | |
| 722 } | |
| 723 | |
| 724 sx = gdImageSX(src); | |
| 725 sy = gdImageSY(src); | |
| 726 | |
| 727 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); | |
| 728 | |
|
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729 if (!ctx->force |
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730 && (ngx_uint_t) sx <= ctx->max_width |
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731 && (ngx_uint_t) sy <= ctx->max_height) |
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732 { |
| 2788 | 733 gdImageDestroy(src); |
| 734 return ngx_http_image_asis(r, ctx); | |
| 735 } | |
| 736 | |
| 737 colors = gdImageColorsTotal(src); | |
| 3134 | 738 |
| 739 if (colors && conf->transparency) { | |
| 740 transparent = gdImageGetTransparent(src); | |
| 741 | |
| 742 if (transparent != -1) { | |
| 743 palette = colors; | |
| 744 red = gdImageRed(src, transparent); | |
| 745 green = gdImageGreen(src, transparent); | |
| 746 blue = gdImageBlue(src, transparent); | |
| 2788 | 747 |
| 3134 | 748 goto transparent; |
| 749 } | |
| 750 } | |
| 3117 | 751 |
| 3134 | 752 palette = 0; |
| 753 transparent = -1; | |
| 754 red = 0; | |
| 755 green = 0; | |
| 756 blue = 0; | |
| 757 | |
| 758 transparent: | |
| 759 | |
| 760 gdImageColorTransparent(src, -1); | |
| 3117 | 761 |
| 2788 | 762 dx = sx; |
| 763 dy = sy; | |
| 764 | |
| 765 if (conf->filter == NGX_HTTP_IMAGE_RESIZE) { | |
| 766 | |
|
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767 if ((ngx_uint_t) dx > ctx->max_width) { |
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768 dy = dy * ctx->max_width / dx; |
| 2788 | 769 dy = dy ? dy : 1; |
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770 dx = ctx->max_width; |
| 2788 | 771 } |
| 772 | |
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773 if ((ngx_uint_t) dy > ctx->max_height) { |
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774 dx = dx * ctx->max_height / dy; |
| 2788 | 775 dx = dx ? dx : 1; |
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776 dy = ctx->max_height; |
| 2788 | 777 } |
| 778 | |
| 779 resize = 1; | |
| 780 | |
| 781 } else { /* NGX_HTTP_IMAGE_CROP */ | |
| 782 | |
| 783 resize = 0; | |
| 784 | |
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785 if ((ngx_uint_t) (dx * 100 / dy) |
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786 < ctx->max_width * 100 / ctx->max_height) |
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787 { |
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788 if ((ngx_uint_t) dx > ctx->max_width) { |
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789 dy = dy * ctx->max_width / dx; |
| 2788 | 790 dy = dy ? dy : 1; |
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791 dx = ctx->max_width; |
| 2788 | 792 resize = 1; |
| 793 } | |
| 794 | |
| 795 } else { | |
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796 if ((ngx_uint_t) dy > ctx->max_height) { |
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797 dx = dx * ctx->max_height / dy; |
| 2788 | 798 dx = dx ? dx : 1; |
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799 dy = ctx->max_height; |
| 2788 | 800 resize = 1; |
| 801 } | |
| 802 } | |
| 803 } | |
| 804 | |
| 805 if (resize) { | |
| 3134 | 806 dst = ngx_http_image_new(r, dx, dy, palette); |
| 2788 | 807 if (dst == NULL) { |
| 808 gdImageDestroy(src); | |
| 809 return NULL; | |
| 810 } | |
| 811 | |
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812 if (colors == 0) { |
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813 gdImageSaveAlpha(dst, 1); |
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814 gdImageAlphaBlending(dst, 0); |
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815 } |
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816 |
| 2788 | 817 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy); |
| 818 | |
| 3134 | 819 if (colors) { |
| 820 gdImageTrueColorToPalette(dst, 1, 256); | |
| 821 } | |
| 822 | |
| 2788 | 823 gdImageDestroy(src); |
| 824 | |
| 825 } else { | |
| 826 dst = src; | |
| 827 } | |
| 828 | |
| 829 if (conf->filter == NGX_HTTP_IMAGE_CROP) { | |
| 830 | |
| 831 src = dst; | |
| 832 | |
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833 if ((ngx_uint_t) dx > ctx->max_width) { |
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834 ox = dx - ctx->max_width; |
| 2788 | 835 |
| 836 } else { | |
| 837 ox = 0; | |
| 838 } | |
| 839 | |
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840 if ((ngx_uint_t) dy > ctx->max_height) { |
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841 oy = dy - ctx->max_height; |
| 2788 | 842 |
| 843 } else { | |
| 844 oy = 0; | |
| 845 } | |
| 846 | |
| 847 if (ox || oy) { | |
| 848 | |
| 849 dst = ngx_http_image_new(r, dx - ox, dy - oy, colors); | |
| 850 | |
| 851 if (dst == NULL) { | |
| 852 gdImageDestroy(src); | |
| 853 return NULL; | |
| 854 } | |
| 855 | |
| 856 ox /= 2; | |
| 857 oy /= 2; | |
| 858 | |
| 859 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 860 "image crop: %d x %d @ %d x %d", | |
| 861 dx, dy, ox, oy); | |
| 862 | |
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863 if (colors == 0) { |
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864 gdImageSaveAlpha(dst, 1); |
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865 gdImageAlphaBlending(dst, 0); |
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866 } |
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867 |
| 2788 | 868 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy); |
| 869 | |
| 3134 | 870 if (colors) { |
| 871 gdImageTrueColorToPalette(dst, 1, 256); | |
| 872 } | |
| 873 | |
| 2788 | 874 gdImageDestroy(src); |
| 875 } | |
| 876 } | |
| 877 | |
| 3117 | 878 if (transparent != -1 && colors) { |
| 879 gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue)); | |
| 880 } | |
| 2788 | 881 |
| 882 out = ngx_http_image_out(r, ctx->type, dst, &size); | |
| 883 | |
| 884 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 885 "image: %d x %d %d", sx, sy, colors); | |
| 886 | |
| 887 gdImageDestroy(dst); | |
| 888 ngx_pfree(r->pool, ctx->image); | |
| 889 | |
| 890 if (out == NULL) { | |
| 891 return NULL; | |
| 892 } | |
| 893 | |
| 894 cln = ngx_pool_cleanup_add(r->pool, 0); | |
| 895 if (cln == NULL) { | |
| 896 gdFree(out); | |
| 897 return NULL; | |
| 898 } | |
| 899 | |
| 900 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 901 if (b == NULL) { | |
| 902 gdFree(out); | |
| 903 return NULL; | |
| 904 } | |
| 905 | |
| 906 cln->handler = ngx_http_image_cleanup; | |
| 907 cln->data = out; | |
| 908 | |
| 909 b->pos = out; | |
| 910 b->last = out + size; | |
| 911 b->memory = 1; | |
| 912 b->last_buf = 1; | |
| 913 | |
| 914 ngx_http_image_length(r, b); | |
| 915 | |
| 916 return b; | |
| 917 } | |
| 918 | |
| 919 | |
| 920 static gdImagePtr | |
| 921 ngx_http_image_source(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 922 { | |
| 923 char *failed; | |
| 924 gdImagePtr img; | |
| 925 | |
| 926 img = NULL; | |
| 927 | |
| 928 switch (ctx->type) { | |
| 929 | |
| 930 case NGX_HTTP_IMAGE_JPEG: | |
| 931 img = gdImageCreateFromJpegPtr(ctx->length, ctx->image); | |
| 932 failed = "gdImageCreateFromJpegPtr() failed"; | |
| 933 break; | |
| 934 | |
| 935 case NGX_HTTP_IMAGE_GIF: | |
| 936 img = gdImageCreateFromGifPtr(ctx->length, ctx->image); | |
| 937 failed = "gdImageCreateFromGifPtr() failed"; | |
| 938 break; | |
| 939 | |
| 940 case NGX_HTTP_IMAGE_PNG: | |
| 941 img = gdImageCreateFromPngPtr(ctx->length, ctx->image); | |
| 942 failed = "gdImageCreateFromPngPtr() failed"; | |
| 943 break; | |
| 944 | |
| 945 default: | |
| 946 failed = "unknown image type"; | |
| 947 break; | |
| 948 } | |
| 949 | |
| 950 if (img == NULL) { | |
| 951 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed); | |
| 952 } | |
| 953 | |
| 954 return img; | |
| 955 } | |
| 956 | |
| 957 | |
| 958 static gdImagePtr | |
| 959 ngx_http_image_new(ngx_http_request_t *r, int w, int h, int colors) | |
| 960 { | |
| 961 gdImagePtr img; | |
| 962 | |
| 963 if (colors == 0) { | |
| 964 img = gdImageCreateTrueColor(w, h); | |
| 965 | |
| 966 if (img == NULL) { | |
| 967 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 968 "gdImageCreateTrueColor() failed"); | |
| 969 return NULL; | |
| 970 } | |
| 971 | |
| 972 } else { | |
| 973 img = gdImageCreate(w, h); | |
| 974 | |
| 975 if (img == NULL) { | |
| 976 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 977 "gdImageCreate() failed"); | |
| 978 return NULL; | |
| 979 } | |
| 980 } | |
| 981 | |
| 982 return img; | |
| 983 } | |
| 984 | |
| 985 | |
| 986 static u_char * | |
| 987 ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, gdImagePtr img, | |
| 988 int *size) | |
| 989 { | |
| 2848 | 990 char *failed; |
| 991 u_char *out; | |
| 992 ngx_http_image_filter_conf_t *conf; | |
| 2788 | 993 |
| 994 out = NULL; | |
| 995 | |
| 996 switch (type) { | |
| 997 | |
| 998 case NGX_HTTP_IMAGE_JPEG: | |
| 2848 | 999 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); |
| 1000 out = gdImageJpegPtr(img, size, conf->jpeg_quality); | |
| 2788 | 1001 failed = "gdImageJpegPtr() failed"; |
| 1002 break; | |
| 1003 | |
| 1004 case NGX_HTTP_IMAGE_GIF: | |
| 1005 out = gdImageGifPtr(img, size); | |
| 1006 failed = "gdImageGifPtr() failed"; | |
| 1007 break; | |
| 1008 | |
| 1009 case NGX_HTTP_IMAGE_PNG: | |
| 1010 out = gdImagePngPtr(img, size); | |
| 1011 failed = "gdImagePngPtr() failed"; | |
| 1012 break; | |
| 1013 | |
| 1014 default: | |
| 1015 failed = "unknown image type"; | |
| 1016 break; | |
| 1017 } | |
| 1018 | |
| 1019 if (out == NULL) { | |
| 1020 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed); | |
| 1021 } | |
| 1022 | |
| 1023 return out; | |
| 1024 } | |
| 1025 | |
| 1026 | |
| 1027 static void | |
| 1028 ngx_http_image_cleanup(void *data) | |
| 1029 { | |
| 1030 gdFree(data); | |
| 1031 } | |
| 1032 | |
| 1033 | |
|
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1034 static ngx_uint_t |
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1035 ngx_http_image_filter_get_value(ngx_http_request_t *r, |
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1036 ngx_http_complex_value_t *cv, ngx_uint_t v) |
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1037 { |
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1038 ngx_str_t val; |
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1039 |
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1040 if (cv == NULL) { |
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1041 return v; |
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1042 } |
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1043 |
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1044 if (ngx_http_complex_value(r, cv, &val) != NGX_OK) { |
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1045 return 0; |
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1046 } |
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1047 |
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1048 return ngx_http_image_filter_value(&val); |
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1049 } |
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1050 |
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1051 |
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1052 static ngx_uint_t |
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1053 ngx_http_image_filter_value(ngx_str_t *value) |
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1054 { |
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1055 ngx_int_t n; |
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1056 |
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1057 if (value->len == 1 && value->data[0] == '-') { |
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1058 return (ngx_uint_t) -1; |
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1059 } |
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1060 |
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1061 n = ngx_atoi(value->data, value->len); |
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1062 |
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1063 if (n > 0) { |
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1064 return (ngx_uint_t) n; |
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1065 } |
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1066 |
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1067 return 0; |
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1068 } |
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1069 |
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1070 |
| 2788 | 1071 static void * |
| 1072 ngx_http_image_filter_create_conf(ngx_conf_t *cf) | |
| 1073 { | |
| 1074 ngx_http_image_filter_conf_t *conf; | |
| 1075 | |
| 1076 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t)); | |
| 1077 if (conf == NULL) { | |
|
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1078 return NULL; |
| 2788 | 1079 } |
| 1080 | |
| 1081 conf->filter = NGX_CONF_UNSET_UINT; | |
| 2848 | 1082 conf->jpeg_quality = NGX_CONF_UNSET; |
| 3134 | 1083 conf->transparency = NGX_CONF_UNSET; |
| 2788 | 1084 conf->buffer_size = NGX_CONF_UNSET_SIZE; |
| 1085 | |
| 1086 return conf; | |
| 1087 } | |
| 1088 | |
| 1089 | |
| 1090 static char * | |
| 1091 ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 1092 { | |
| 1093 ngx_http_image_filter_conf_t *prev = parent; | |
| 1094 ngx_http_image_filter_conf_t *conf = child; | |
| 1095 | |
| 1096 if (conf->filter == NGX_CONF_UNSET_UINT) { | |
| 1097 | |
| 1098 if (prev->filter == NGX_CONF_UNSET_UINT) { | |
| 1099 conf->filter = NGX_HTTP_IMAGE_OFF; | |
| 1100 | |
| 1101 } else { | |
| 1102 conf->filter = prev->filter; | |
| 1103 conf->width = prev->width; | |
| 1104 conf->height = prev->height; | |
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1105 conf->wcv = prev->wcv; |
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1106 conf->hcv = prev->hcv; |
| 2788 | 1107 } |
| 1108 } | |
| 1109 | |
| 2848 | 1110 /* 75 is libjpeg default quality */ |
| 1111 ngx_conf_merge_value(conf->jpeg_quality, prev->jpeg_quality, 75); | |
| 1112 | |
| 3134 | 1113 ngx_conf_merge_value(conf->transparency, prev->transparency, 1); |
| 1114 | |
| 2788 | 1115 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, |
| 1116 1 * 1024 * 1024); | |
| 1117 | |
| 1118 return NGX_CONF_OK; | |
| 1119 } | |
| 1120 | |
| 1121 | |
| 1122 static char * | |
| 1123 ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 1124 { | |
| 1125 ngx_http_image_filter_conf_t *imcf = conf; | |
| 1126 | |
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1127 ngx_str_t *value; |
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1128 ngx_int_t n; |
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1129 ngx_uint_t i; |
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1130 ngx_http_complex_value_t cv; |
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1131 ngx_http_compile_complex_value_t ccv; |
| 2788 | 1132 |
| 1133 value = cf->args->elts; | |
| 1134 | |
| 1135 i = 1; | |
| 1136 | |
| 1137 if (cf->args->nelts == 2) { | |
| 1138 if (ngx_strcmp(value[i].data, "off") == 0) { | |
| 1139 imcf->filter = NGX_HTTP_IMAGE_OFF; | |
| 1140 | |
| 1141 } else if (ngx_strcmp(value[i].data, "test") == 0) { | |
| 1142 imcf->filter = NGX_HTTP_IMAGE_TEST; | |
| 1143 | |
| 1144 } else if (ngx_strcmp(value[i].data, "size") == 0) { | |
| 1145 imcf->filter = NGX_HTTP_IMAGE_SIZE; | |
| 1146 | |
| 1147 } else { | |
| 1148 goto failed; | |
| 1149 } | |
| 1150 | |
| 1151 return NGX_CONF_OK; | |
| 1152 } | |
| 1153 | |
| 1154 if (ngx_strcmp(value[i].data, "resize") == 0) { | |
| 1155 imcf->filter = NGX_HTTP_IMAGE_RESIZE; | |
| 1156 | |
| 1157 } else if (ngx_strcmp(value[i].data, "crop") == 0) { | |
| 1158 imcf->filter = NGX_HTTP_IMAGE_CROP; | |
| 1159 | |
| 1160 } else { | |
| 1161 goto failed; | |
| 1162 } | |
| 1163 | |
|
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1164 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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1165 |
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1166 ccv.cf = cf; |
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1167 ccv.value = &value[++i]; |
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1168 ccv.complex_value = &cv; |
| 2788 | 1169 |
|
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1170 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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1171 return NGX_CONF_ERROR; |
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1172 } |
| 2788 | 1173 |
|
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1174 if (cv.lengths == NULL) { |
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1175 n = ngx_http_image_filter_value(&value[i]); |
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1176 |
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1177 if (n == 0) { |
| 2788 | 1178 goto failed; |
| 1179 } | |
| 1180 | |
| 1181 imcf->width = (ngx_uint_t) n; | |
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1182 |
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1183 } else { |
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1184 imcf->wcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
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1185 if (imcf->wcv == NULL) { |
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1186 return NGX_CONF_ERROR; |
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1187 } |
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1188 |
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1189 *imcf->wcv = cv; |
| 2788 | 1190 } |
| 1191 | |
|
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1192 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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1193 |
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1194 ccv.cf = cf; |
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1195 ccv.value = &value[++i]; |
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1196 ccv.complex_value = &cv; |
| 2788 | 1197 |
|
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1198 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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1199 return NGX_CONF_ERROR; |
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1200 } |
| 2788 | 1201 |
|
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1202 if (cv.lengths == NULL) { |
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1203 n = ngx_http_image_filter_value(&value[i]); |
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1204 |
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1205 if (n == 0) { |
| 2788 | 1206 goto failed; |
| 1207 } | |
| 1208 | |
| 1209 imcf->height = (ngx_uint_t) n; | |
|
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1210 |
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1211 } else { |
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1212 imcf->hcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
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1213 if (imcf->hcv == NULL) { |
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1214 return NGX_CONF_ERROR; |
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1215 } |
|
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1216 |
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1217 *imcf->hcv = cv; |
| 2788 | 1218 } |
| 1219 | |
| 1220 return NGX_CONF_OK; | |
| 1221 | |
| 1222 failed: | |
| 1223 | |
| 1224 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", | |
| 1225 &value[i]); | |
| 1226 | |
| 1227 return NGX_CONF_ERROR; | |
| 1228 } | |
| 1229 | |
| 1230 | |
| 1231 static ngx_int_t | |
| 1232 ngx_http_image_filter_init(ngx_conf_t *cf) | |
| 1233 { | |
| 1234 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 1235 ngx_http_top_header_filter = ngx_http_image_header_filter; | |
| 1236 | |
| 1237 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 1238 ngx_http_top_body_filter = ngx_http_image_body_filter; | |
| 1239 | |
| 1240 return NGX_OK; | |
| 1241 } |