Mercurial > hg > nginx
annotate src/http/modules/ngx_http_image_filter_module.c @ 3394:11965c62b92c
force image filter conversion if JPEG application data consume more than 5%
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 22 Dec 2009 13:03:49 +0000 |
| parents | fbf6d83ce288 |
| children | dd1570b6f237 |
| 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 | |
| 231 return NGX_ERROR; | |
| 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; | |
| 532 r->headers_out.content_type.len = sizeof("text/plain") - 1; | |
| 533 r->headers_out.content_type.data = (u_char *) "text/plain"; | |
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534 r->headers_out.content_type_lowcase = NULL; |
| 2788 | 535 |
| 536 if (ctx == NULL) { | |
| 537 b->pos = (u_char *) "{}" CRLF; | |
| 538 b->last = b->pos + sizeof("{}" CRLF) - 1; | |
| 539 | |
| 540 ngx_http_image_length(r, b); | |
| 541 | |
| 542 return b; | |
| 543 } | |
| 544 | |
| 545 len = sizeof("{ \"img\" : " | |
| 546 "{ \"width\": , \"height\": , \"type\": \"jpeg\" } }" CRLF) - 1 | |
| 547 + 2 * NGX_SIZE_T_LEN; | |
| 548 | |
| 549 b->pos = ngx_pnalloc(r->pool, len); | |
| 550 if (b->pos == NULL) { | |
| 551 return NULL; | |
| 552 } | |
| 553 | |
| 554 b->last = ngx_sprintf(b->pos, | |
| 555 "{ \"img\" : " | |
| 556 "{ \"width\": %uz," | |
| 557 " \"height\": %uz," | |
| 558 " \"type\": \"%s\" } }" CRLF, | |
| 559 ctx->width, ctx->height, | |
| 560 ngx_http_image_types[ctx->type - 1].data + 6); | |
| 561 | |
| 562 ngx_http_image_length(r, b); | |
| 563 | |
| 564 return b; | |
| 565 } | |
| 566 | |
| 567 | |
| 568 static ngx_buf_t * | |
| 569 ngx_http_image_asis(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 570 { | |
| 571 ngx_buf_t *b; | |
| 572 | |
| 573 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 574 if (b == NULL) { | |
| 575 return NULL; | |
| 576 } | |
| 577 | |
| 578 b->pos = ctx->image; | |
| 579 b->last = ctx->last; | |
| 580 b->memory = 1; | |
| 581 b->last_buf = 1; | |
| 582 | |
| 583 ngx_http_image_length(r, b); | |
| 584 | |
| 585 return b; | |
| 586 } | |
| 587 | |
| 588 | |
| 589 static void | |
| 590 ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b) | |
| 591 { | |
| 592 r->headers_out.content_length_n = b->last - b->pos; | |
| 593 | |
| 594 if (r->headers_out.content_length) { | |
| 595 r->headers_out.content_length->hash = 0; | |
| 596 } | |
| 597 | |
| 598 r->headers_out.content_length = NULL; | |
| 599 } | |
| 600 | |
| 601 | |
| 602 static ngx_int_t | |
| 603 ngx_http_image_size(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 604 { | |
| 605 u_char *p, *last; | |
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606 size_t len, app; |
| 2788 | 607 ngx_uint_t width, height; |
| 608 | |
| 609 p = ctx->image; | |
| 610 | |
| 611 switch (ctx->type) { | |
| 612 | |
| 613 case NGX_HTTP_IMAGE_JPEG: | |
| 614 | |
| 615 p += 2; | |
| 616 last = ctx->image + ctx->length - 10; | |
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617 width = 0; |
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618 height = 0; |
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619 app = 0; |
| 2788 | 620 |
| 621 while (p < last) { | |
| 622 | |
| 623 if (p[0] == 0xff && p[1] != 0xff) { | |
| 624 | |
| 625 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 3393 | 626 "JPEG: %02xd %02xd", p[0], p[1]); |
| 2788 | 627 |
| 628 p++; | |
| 629 | |
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630 if ((*p == 0xc0 || *p == 0xc1 || *p == 0xc2 || *p == 0xc3 |
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631 || *p == 0xc9 || *p == 0xca || *p == 0xcb) |
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632 && (width == 0 || height == 0)) |
| 2788 | 633 { |
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634 width = p[6] * 256 + p[7]; |
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635 height = p[4] * 256 + p[5]; |
| 2788 | 636 } |
| 637 | |
| 638 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 639 "JPEG: %02xd %02xd", p[1], p[2]); | |
| 640 | |
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641 len = p[1] * 256 + p[2]; |
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642 |
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643 if (*p >= 0xe1 && *p <= 0xef) { |
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644 /* application data, e.g., EXIF, Adobe XMP, etc. */ |
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645 app += len; |
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646 } |
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647 |
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648 p += len; |
| 2788 | 649 |
| 650 continue; | |
| 651 } | |
| 652 | |
| 653 p++; | |
| 654 } | |
| 655 | |
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656 if (width == 0 || height == 0) { |
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657 return NGX_DECLINED; |
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658 } |
| 2788 | 659 |
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660 if (ctx->length / 20 < app) { |
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661 /* force conversion if application data consume more than 5% */ |
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662 ctx->force = 1; |
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663 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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664 "app data size: %uz", app); |
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665 } |
| 2788 | 666 |
| 667 break; | |
| 668 | |
| 669 case NGX_HTTP_IMAGE_GIF: | |
| 670 | |
| 671 if (ctx->length < 10) { | |
| 672 return NGX_DECLINED; | |
| 673 } | |
| 674 | |
| 675 width = p[7] * 256 + p[6]; | |
| 676 height = p[9] * 256 + p[8]; | |
| 677 | |
| 678 break; | |
| 679 | |
| 680 case NGX_HTTP_IMAGE_PNG: | |
| 681 | |
| 682 if (ctx->length < 24) { | |
| 683 return NGX_DECLINED; | |
| 684 } | |
| 685 | |
| 686 width = p[18] * 256 + p[19]; | |
| 687 height = p[22] * 256 + p[23]; | |
| 688 | |
| 689 break; | |
| 690 | |
| 691 default: | |
| 692 | |
| 693 return NGX_DECLINED; | |
| 694 } | |
| 695 | |
| 696 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 697 "image size: %d x %d", width, height); | |
| 698 | |
| 699 ctx->width = width; | |
| 700 ctx->height = height; | |
| 701 | |
| 702 return NGX_OK; | |
| 703 } | |
| 704 | |
| 705 | |
| 706 static ngx_buf_t * | |
| 707 ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 708 { | |
| 3134 | 709 int sx, sy, dx, dy, ox, oy, size, |
| 710 colors, palette, transparent, | |
| 711 red, green, blue; | |
| 2788 | 712 u_char *out; |
| 713 ngx_buf_t *b; | |
| 714 ngx_uint_t resize; | |
| 715 gdImagePtr src, dst; | |
| 716 ngx_pool_cleanup_t *cln; | |
| 717 ngx_http_image_filter_conf_t *conf; | |
| 718 | |
| 719 src = ngx_http_image_source(r, ctx); | |
| 720 | |
| 721 if (src == NULL) { | |
| 722 return NULL; | |
| 723 } | |
| 724 | |
| 725 sx = gdImageSX(src); | |
| 726 sy = gdImageSY(src); | |
| 727 | |
| 728 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); | |
| 729 | |
|
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730 if (!ctx->force |
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731 && (ngx_uint_t) sx <= ctx->max_width |
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732 && (ngx_uint_t) sy <= ctx->max_height) |
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733 { |
| 2788 | 734 gdImageDestroy(src); |
| 735 return ngx_http_image_asis(r, ctx); | |
| 736 } | |
| 737 | |
| 738 colors = gdImageColorsTotal(src); | |
| 3134 | 739 |
| 740 if (colors && conf->transparency) { | |
| 741 transparent = gdImageGetTransparent(src); | |
| 742 | |
| 743 if (transparent != -1) { | |
| 744 palette = colors; | |
| 745 red = gdImageRed(src, transparent); | |
| 746 green = gdImageGreen(src, transparent); | |
| 747 blue = gdImageBlue(src, transparent); | |
| 2788 | 748 |
| 3134 | 749 goto transparent; |
| 750 } | |
| 751 } | |
| 3117 | 752 |
| 3134 | 753 palette = 0; |
| 754 transparent = -1; | |
| 755 red = 0; | |
| 756 green = 0; | |
| 757 blue = 0; | |
| 758 | |
| 759 transparent: | |
| 760 | |
| 761 gdImageColorTransparent(src, -1); | |
| 3117 | 762 |
| 2788 | 763 dx = sx; |
| 764 dy = sy; | |
| 765 | |
| 766 if (conf->filter == NGX_HTTP_IMAGE_RESIZE) { | |
| 767 | |
|
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768 if ((ngx_uint_t) dx > ctx->max_width) { |
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769 dy = dy * ctx->max_width / dx; |
| 2788 | 770 dy = dy ? dy : 1; |
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771 dx = ctx->max_width; |
| 2788 | 772 } |
| 773 | |
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774 if ((ngx_uint_t) dy > ctx->max_height) { |
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775 dx = dx * ctx->max_height / dy; |
| 2788 | 776 dx = dx ? dx : 1; |
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777 dy = ctx->max_height; |
| 2788 | 778 } |
| 779 | |
| 780 resize = 1; | |
| 781 | |
| 782 } else { /* NGX_HTTP_IMAGE_CROP */ | |
| 783 | |
| 784 resize = 0; | |
| 785 | |
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786 if ((ngx_uint_t) (dx * 100 / dy) |
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787 < ctx->max_width * 100 / ctx->max_height) |
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788 { |
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789 if ((ngx_uint_t) dx > ctx->max_width) { |
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790 dy = dy * ctx->max_width / dx; |
| 2788 | 791 dy = dy ? dy : 1; |
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792 dx = ctx->max_width; |
| 2788 | 793 resize = 1; |
| 794 } | |
| 795 | |
| 796 } else { | |
|
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797 if ((ngx_uint_t) dy > ctx->max_height) { |
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798 dx = dx * ctx->max_height / dy; |
| 2788 | 799 dx = dx ? dx : 1; |
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800 dy = ctx->max_height; |
| 2788 | 801 resize = 1; |
| 802 } | |
| 803 } | |
| 804 } | |
| 805 | |
| 806 if (resize) { | |
| 3134 | 807 dst = ngx_http_image_new(r, dx, dy, palette); |
| 2788 | 808 if (dst == NULL) { |
| 809 gdImageDestroy(src); | |
| 810 return NULL; | |
| 811 } | |
| 812 | |
|
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813 if (colors == 0) { |
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814 gdImageSaveAlpha(dst, 1); |
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815 gdImageAlphaBlending(dst, 0); |
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816 } |
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817 |
| 2788 | 818 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy); |
| 819 | |
| 3134 | 820 if (colors) { |
| 821 gdImageTrueColorToPalette(dst, 1, 256); | |
| 822 } | |
| 823 | |
| 2788 | 824 gdImageDestroy(src); |
| 825 | |
| 826 } else { | |
| 827 dst = src; | |
| 828 } | |
| 829 | |
| 830 if (conf->filter == NGX_HTTP_IMAGE_CROP) { | |
| 831 | |
| 832 src = dst; | |
| 833 | |
|
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834 if ((ngx_uint_t) dx > ctx->max_width) { |
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835 ox = dx - ctx->max_width; |
| 2788 | 836 |
| 837 } else { | |
| 838 ox = 0; | |
| 839 } | |
| 840 | |
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841 if ((ngx_uint_t) dy > ctx->max_height) { |
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842 oy = dy - ctx->max_height; |
| 2788 | 843 |
| 844 } else { | |
| 845 oy = 0; | |
| 846 } | |
| 847 | |
| 848 if (ox || oy) { | |
| 849 | |
| 850 dst = ngx_http_image_new(r, dx - ox, dy - oy, colors); | |
| 851 | |
| 852 if (dst == NULL) { | |
| 853 gdImageDestroy(src); | |
| 854 return NULL; | |
| 855 } | |
| 856 | |
| 857 ox /= 2; | |
| 858 oy /= 2; | |
| 859 | |
| 860 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 861 "image crop: %d x %d @ %d x %d", | |
| 862 dx, dy, ox, oy); | |
| 863 | |
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864 if (colors == 0) { |
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865 gdImageSaveAlpha(dst, 1); |
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866 gdImageAlphaBlending(dst, 0); |
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867 } |
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868 |
| 2788 | 869 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy); |
| 870 | |
| 3134 | 871 if (colors) { |
| 872 gdImageTrueColorToPalette(dst, 1, 256); | |
| 873 } | |
| 874 | |
| 2788 | 875 gdImageDestroy(src); |
| 876 } | |
| 877 } | |
| 878 | |
| 3117 | 879 if (transparent != -1 && colors) { |
| 880 gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue)); | |
| 881 } | |
| 2788 | 882 |
| 883 out = ngx_http_image_out(r, ctx->type, dst, &size); | |
| 884 | |
| 885 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 886 "image: %d x %d %d", sx, sy, colors); | |
| 887 | |
| 888 gdImageDestroy(dst); | |
| 889 ngx_pfree(r->pool, ctx->image); | |
| 890 | |
| 891 if (out == NULL) { | |
| 892 return NULL; | |
| 893 } | |
| 894 | |
| 895 cln = ngx_pool_cleanup_add(r->pool, 0); | |
| 896 if (cln == NULL) { | |
| 897 gdFree(out); | |
| 898 return NULL; | |
| 899 } | |
| 900 | |
| 901 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 902 if (b == NULL) { | |
| 903 gdFree(out); | |
| 904 return NULL; | |
| 905 } | |
| 906 | |
| 907 cln->handler = ngx_http_image_cleanup; | |
| 908 cln->data = out; | |
| 909 | |
| 910 b->pos = out; | |
| 911 b->last = out + size; | |
| 912 b->memory = 1; | |
| 913 b->last_buf = 1; | |
| 914 | |
| 915 ngx_http_image_length(r, b); | |
| 916 | |
| 917 return b; | |
| 918 } | |
| 919 | |
| 920 | |
| 921 static gdImagePtr | |
| 922 ngx_http_image_source(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 923 { | |
| 924 char *failed; | |
| 925 gdImagePtr img; | |
| 926 | |
| 927 img = NULL; | |
| 928 | |
| 929 switch (ctx->type) { | |
| 930 | |
| 931 case NGX_HTTP_IMAGE_JPEG: | |
| 932 img = gdImageCreateFromJpegPtr(ctx->length, ctx->image); | |
| 933 failed = "gdImageCreateFromJpegPtr() failed"; | |
| 934 break; | |
| 935 | |
| 936 case NGX_HTTP_IMAGE_GIF: | |
| 937 img = gdImageCreateFromGifPtr(ctx->length, ctx->image); | |
| 938 failed = "gdImageCreateFromGifPtr() failed"; | |
| 939 break; | |
| 940 | |
| 941 case NGX_HTTP_IMAGE_PNG: | |
| 942 img = gdImageCreateFromPngPtr(ctx->length, ctx->image); | |
| 943 failed = "gdImageCreateFromPngPtr() failed"; | |
| 944 break; | |
| 945 | |
| 946 default: | |
| 947 failed = "unknown image type"; | |
| 948 break; | |
| 949 } | |
| 950 | |
| 951 if (img == NULL) { | |
| 952 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed); | |
| 953 } | |
| 954 | |
| 955 return img; | |
| 956 } | |
| 957 | |
| 958 | |
| 959 static gdImagePtr | |
| 960 ngx_http_image_new(ngx_http_request_t *r, int w, int h, int colors) | |
| 961 { | |
| 962 gdImagePtr img; | |
| 963 | |
| 964 if (colors == 0) { | |
| 965 img = gdImageCreateTrueColor(w, h); | |
| 966 | |
| 967 if (img == NULL) { | |
| 968 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 969 "gdImageCreateTrueColor() failed"); | |
| 970 return NULL; | |
| 971 } | |
| 972 | |
| 973 } else { | |
| 974 img = gdImageCreate(w, h); | |
| 975 | |
| 976 if (img == NULL) { | |
| 977 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 978 "gdImageCreate() failed"); | |
| 979 return NULL; | |
| 980 } | |
| 981 } | |
| 982 | |
| 983 return img; | |
| 984 } | |
| 985 | |
| 986 | |
| 987 static u_char * | |
| 988 ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, gdImagePtr img, | |
| 989 int *size) | |
| 990 { | |
| 2848 | 991 char *failed; |
| 992 u_char *out; | |
| 993 ngx_http_image_filter_conf_t *conf; | |
| 2788 | 994 |
| 995 out = NULL; | |
| 996 | |
| 997 switch (type) { | |
| 998 | |
| 999 case NGX_HTTP_IMAGE_JPEG: | |
| 2848 | 1000 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); |
| 1001 out = gdImageJpegPtr(img, size, conf->jpeg_quality); | |
| 2788 | 1002 failed = "gdImageJpegPtr() failed"; |
| 1003 break; | |
| 1004 | |
| 1005 case NGX_HTTP_IMAGE_GIF: | |
| 1006 out = gdImageGifPtr(img, size); | |
| 1007 failed = "gdImageGifPtr() failed"; | |
| 1008 break; | |
| 1009 | |
| 1010 case NGX_HTTP_IMAGE_PNG: | |
| 1011 out = gdImagePngPtr(img, size); | |
| 1012 failed = "gdImagePngPtr() failed"; | |
| 1013 break; | |
| 1014 | |
| 1015 default: | |
| 1016 failed = "unknown image type"; | |
| 1017 break; | |
| 1018 } | |
| 1019 | |
| 1020 if (out == NULL) { | |
| 1021 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed); | |
| 1022 } | |
| 1023 | |
| 1024 return out; | |
| 1025 } | |
| 1026 | |
| 1027 | |
| 1028 static void | |
| 1029 ngx_http_image_cleanup(void *data) | |
| 1030 { | |
| 1031 gdFree(data); | |
| 1032 } | |
| 1033 | |
| 1034 | |
|
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1035 static ngx_uint_t |
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1036 ngx_http_image_filter_get_value(ngx_http_request_t *r, |
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1037 ngx_http_complex_value_t *cv, ngx_uint_t v) |
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1038 { |
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1039 ngx_str_t val; |
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1040 |
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1041 if (cv == NULL) { |
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1042 return v; |
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1043 } |
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1044 |
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1045 if (ngx_http_complex_value(r, cv, &val) != NGX_OK) { |
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1046 return 0; |
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1047 } |
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1048 |
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1049 return ngx_http_image_filter_value(&val); |
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1050 } |
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1051 |
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1052 |
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1053 static ngx_uint_t |
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1054 ngx_http_image_filter_value(ngx_str_t *value) |
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1055 { |
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1056 ngx_int_t n; |
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1057 |
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1058 if (value->len == 1 && value->data[0] == '-') { |
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1059 return (ngx_uint_t) -1; |
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1060 } |
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1061 |
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1062 n = ngx_atoi(value->data, value->len); |
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1063 |
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1064 if (n > 0) { |
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1065 return (ngx_uint_t) n; |
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1066 } |
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1067 |
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1068 return 0; |
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1069 } |
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1070 |
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1071 |
| 2788 | 1072 static void * |
| 1073 ngx_http_image_filter_create_conf(ngx_conf_t *cf) | |
| 1074 { | |
| 1075 ngx_http_image_filter_conf_t *conf; | |
| 1076 | |
| 1077 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t)); | |
| 1078 if (conf == NULL) { | |
|
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1079 return NULL; |
| 2788 | 1080 } |
| 1081 | |
| 1082 conf->filter = NGX_CONF_UNSET_UINT; | |
| 2848 | 1083 conf->jpeg_quality = NGX_CONF_UNSET; |
| 3134 | 1084 conf->transparency = NGX_CONF_UNSET; |
| 2788 | 1085 conf->buffer_size = NGX_CONF_UNSET_SIZE; |
| 1086 | |
| 1087 return conf; | |
| 1088 } | |
| 1089 | |
| 1090 | |
| 1091 static char * | |
| 1092 ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 1093 { | |
| 1094 ngx_http_image_filter_conf_t *prev = parent; | |
| 1095 ngx_http_image_filter_conf_t *conf = child; | |
| 1096 | |
| 1097 if (conf->filter == NGX_CONF_UNSET_UINT) { | |
| 1098 | |
| 1099 if (prev->filter == NGX_CONF_UNSET_UINT) { | |
| 1100 conf->filter = NGX_HTTP_IMAGE_OFF; | |
| 1101 | |
| 1102 } else { | |
| 1103 conf->filter = prev->filter; | |
| 1104 conf->width = prev->width; | |
| 1105 conf->height = prev->height; | |
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1106 conf->wcv = prev->wcv; |
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1107 conf->hcv = prev->hcv; |
| 2788 | 1108 } |
| 1109 } | |
| 1110 | |
| 2848 | 1111 /* 75 is libjpeg default quality */ |
| 1112 ngx_conf_merge_value(conf->jpeg_quality, prev->jpeg_quality, 75); | |
| 1113 | |
| 3134 | 1114 ngx_conf_merge_value(conf->transparency, prev->transparency, 1); |
| 1115 | |
| 2788 | 1116 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, |
| 1117 1 * 1024 * 1024); | |
| 1118 | |
| 1119 return NGX_CONF_OK; | |
| 1120 } | |
| 1121 | |
| 1122 | |
| 1123 static char * | |
| 1124 ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 1125 { | |
| 1126 ngx_http_image_filter_conf_t *imcf = conf; | |
| 1127 | |
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1128 ngx_str_t *value; |
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1129 ngx_int_t n; |
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1130 ngx_uint_t i; |
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1131 ngx_http_complex_value_t cv; |
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1132 ngx_http_compile_complex_value_t ccv; |
| 2788 | 1133 |
| 1134 value = cf->args->elts; | |
| 1135 | |
| 1136 i = 1; | |
| 1137 | |
| 1138 if (cf->args->nelts == 2) { | |
| 1139 if (ngx_strcmp(value[i].data, "off") == 0) { | |
| 1140 imcf->filter = NGX_HTTP_IMAGE_OFF; | |
| 1141 | |
| 1142 } else if (ngx_strcmp(value[i].data, "test") == 0) { | |
| 1143 imcf->filter = NGX_HTTP_IMAGE_TEST; | |
| 1144 | |
| 1145 } else if (ngx_strcmp(value[i].data, "size") == 0) { | |
| 1146 imcf->filter = NGX_HTTP_IMAGE_SIZE; | |
| 1147 | |
| 1148 } else { | |
| 1149 goto failed; | |
| 1150 } | |
| 1151 | |
| 1152 return NGX_CONF_OK; | |
| 1153 } | |
| 1154 | |
| 1155 if (ngx_strcmp(value[i].data, "resize") == 0) { | |
| 1156 imcf->filter = NGX_HTTP_IMAGE_RESIZE; | |
| 1157 | |
| 1158 } else if (ngx_strcmp(value[i].data, "crop") == 0) { | |
| 1159 imcf->filter = NGX_HTTP_IMAGE_CROP; | |
| 1160 | |
| 1161 } else { | |
| 1162 goto failed; | |
| 1163 } | |
| 1164 | |
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1165 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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1166 |
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1167 ccv.cf = cf; |
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1168 ccv.value = &value[++i]; |
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1169 ccv.complex_value = &cv; |
| 2788 | 1170 |
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1171 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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1172 return NGX_CONF_ERROR; |
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1173 } |
| 2788 | 1174 |
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1175 if (cv.lengths == NULL) { |
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1176 n = ngx_http_image_filter_value(&value[i]); |
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1177 |
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1178 if (n == 0) { |
| 2788 | 1179 goto failed; |
| 1180 } | |
| 1181 | |
| 1182 imcf->width = (ngx_uint_t) n; | |
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1183 |
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1184 } else { |
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1185 imcf->wcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
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1186 if (imcf->wcv == NULL) { |
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1187 return NGX_CONF_ERROR; |
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1188 } |
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1189 |
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1190 *imcf->wcv = cv; |
| 2788 | 1191 } |
| 1192 | |
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1193 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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1194 |
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1195 ccv.cf = cf; |
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1196 ccv.value = &value[++i]; |
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1197 ccv.complex_value = &cv; |
| 2788 | 1198 |
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1199 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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1200 return NGX_CONF_ERROR; |
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1201 } |
| 2788 | 1202 |
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1203 if (cv.lengths == NULL) { |
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1204 n = ngx_http_image_filter_value(&value[i]); |
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1205 |
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1206 if (n == 0) { |
| 2788 | 1207 goto failed; |
| 1208 } | |
| 1209 | |
| 1210 imcf->height = (ngx_uint_t) n; | |
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1211 |
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1212 } else { |
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1213 imcf->hcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
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1214 if (imcf->hcv == NULL) { |
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1215 return NGX_CONF_ERROR; |
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1216 } |
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1217 |
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1218 *imcf->hcv = cv; |
| 2788 | 1219 } |
| 1220 | |
| 1221 return NGX_CONF_OK; | |
| 1222 | |
| 1223 failed: | |
| 1224 | |
| 1225 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", | |
| 1226 &value[i]); | |
| 1227 | |
| 1228 return NGX_CONF_ERROR; | |
| 1229 } | |
| 1230 | |
| 1231 | |
| 1232 static ngx_int_t | |
| 1233 ngx_http_image_filter_init(ngx_conf_t *cf) | |
| 1234 { | |
| 1235 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 1236 ngx_http_top_header_filter = ngx_http_image_header_filter; | |
| 1237 | |
| 1238 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 1239 ngx_http_top_body_filter = ngx_http_image_body_filter; | |
| 1240 | |
| 1241 return NGX_OK; | |
| 1242 } |