Mercurial > hg > nginx
annotate src/http/modules/ngx_http_image_filter_module.c @ 3910:750fb808aa15
gdImageCopyRotated() may images of even height or width
patch by Adam Bocim
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 10 May 2011 12:04:57 +0000 |
| parents | ea712f4dc030 |
| children | 01a7e78ff5a1 d0e52213406f |
| 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 | |
| 3878 | 19 #define NGX_HTTP_IMAGE_ROTATE 5 |
| 2788 | 20 |
| 21 | |
| 22 #define NGX_HTTP_IMAGE_START 0 | |
| 23 #define NGX_HTTP_IMAGE_READ 1 | |
| 24 #define NGX_HTTP_IMAGE_PROCESS 2 | |
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25 #define NGX_HTTP_IMAGE_PASS 3 |
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26 #define NGX_HTTP_IMAGE_DONE 4 |
| 2788 | 27 |
| 28 | |
| 29 #define NGX_HTTP_IMAGE_NONE 0 | |
| 30 #define NGX_HTTP_IMAGE_JPEG 1 | |
| 31 #define NGX_HTTP_IMAGE_GIF 2 | |
| 32 #define NGX_HTTP_IMAGE_PNG 3 | |
| 33 | |
| 34 | |
| 35 #define NGX_HTTP_IMAGE_BUFFERED 0x08 | |
| 36 | |
| 37 | |
| 38 typedef struct { | |
| 39 ngx_uint_t filter; | |
| 40 ngx_uint_t width; | |
| 41 ngx_uint_t height; | |
| 3878 | 42 ngx_uint_t angle; |
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43 ngx_uint_t jpeg_quality; |
| 2788 | 44 |
| 3134 | 45 ngx_flag_t transparency; |
| 46 | |
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47 ngx_http_complex_value_t *wcv; |
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48 ngx_http_complex_value_t *hcv; |
| 3878 | 49 ngx_http_complex_value_t *acv; |
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50 ngx_http_complex_value_t *jqcv; |
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51 |
| 2788 | 52 size_t buffer_size; |
| 53 } ngx_http_image_filter_conf_t; | |
| 54 | |
| 55 | |
| 56 typedef struct { | |
| 57 u_char *image; | |
| 58 u_char *last; | |
| 59 | |
| 60 size_t length; | |
| 61 | |
| 62 ngx_uint_t width; | |
| 63 ngx_uint_t height; | |
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64 ngx_uint_t max_width; |
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65 ngx_uint_t max_height; |
| 3878 | 66 ngx_uint_t angle; |
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67 |
| 2788 | 68 ngx_uint_t phase; |
| 69 ngx_uint_t type; | |
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70 ngx_uint_t force; |
| 2788 | 71 } ngx_http_image_filter_ctx_t; |
| 72 | |
| 73 | |
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74 static ngx_int_t ngx_http_image_send(ngx_http_request_t *r, |
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75 ngx_http_image_filter_ctx_t *ctx, ngx_chain_t *in); |
| 2788 | 76 static ngx_uint_t ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in); |
| 77 static ngx_int_t ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in); | |
| 78 static ngx_buf_t *ngx_http_image_process(ngx_http_request_t *r); | |
| 79 static ngx_buf_t *ngx_http_image_json(ngx_http_request_t *r, | |
| 80 ngx_http_image_filter_ctx_t *ctx); | |
| 81 static ngx_buf_t *ngx_http_image_asis(ngx_http_request_t *r, | |
| 82 ngx_http_image_filter_ctx_t *ctx); | |
| 83 static void ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b); | |
| 84 static ngx_int_t ngx_http_image_size(ngx_http_request_t *r, | |
| 85 ngx_http_image_filter_ctx_t *ctx); | |
| 86 | |
| 87 static ngx_buf_t *ngx_http_image_resize(ngx_http_request_t *r, | |
| 88 ngx_http_image_filter_ctx_t *ctx); | |
| 89 static gdImagePtr ngx_http_image_source(ngx_http_request_t *r, | |
| 90 ngx_http_image_filter_ctx_t *ctx); | |
| 91 static gdImagePtr ngx_http_image_new(ngx_http_request_t *r, int w, int h, | |
| 92 int colors); | |
| 93 static u_char *ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, | |
| 94 gdImagePtr img, int *size); | |
| 95 static void ngx_http_image_cleanup(void *data); | |
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96 static ngx_uint_t ngx_http_image_filter_get_value(ngx_http_request_t *r, |
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97 ngx_http_complex_value_t *cv, ngx_uint_t v); |
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98 static ngx_uint_t ngx_http_image_filter_value(ngx_str_t *value); |
| 2788 | 99 |
| 100 | |
| 101 static void *ngx_http_image_filter_create_conf(ngx_conf_t *cf); | |
| 102 static char *ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, | |
| 103 void *child); | |
| 104 static char *ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 105 void *conf); | |
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106 static char *ngx_http_image_filter_jpeg_quality(ngx_conf_t *cf, |
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107 ngx_command_t *cmd, void *conf); |
| 2788 | 108 static ngx_int_t ngx_http_image_filter_init(ngx_conf_t *cf); |
| 109 | |
| 110 | |
| 111 static ngx_command_t ngx_http_image_filter_commands[] = { | |
| 112 | |
| 113 { ngx_string("image_filter"), | |
| 3878 | 114 NGX_HTTP_LOC_CONF|NGX_CONF_TAKE13|NGX_CONF_TAKE2, |
| 2788 | 115 ngx_http_image_filter, |
| 116 NGX_HTTP_LOC_CONF_OFFSET, | |
| 117 0, | |
| 118 NULL }, | |
| 119 | |
| 2848 | 120 { ngx_string("image_filter_jpeg_quality"), |
| 121 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
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122 ngx_http_image_filter_jpeg_quality, |
| 2848 | 123 NGX_HTTP_LOC_CONF_OFFSET, |
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124 0, |
| 2848 | 125 NULL }, |
| 126 | |
| 3134 | 127 { ngx_string("image_filter_transparency"), |
| 128 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
| 129 ngx_conf_set_flag_slot, | |
| 130 NGX_HTTP_LOC_CONF_OFFSET, | |
| 131 offsetof(ngx_http_image_filter_conf_t, transparency), | |
| 132 NULL }, | |
| 133 | |
| 2788 | 134 { ngx_string("image_filter_buffer"), |
| 135 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 136 ngx_conf_set_size_slot, | |
| 137 NGX_HTTP_LOC_CONF_OFFSET, | |
| 138 offsetof(ngx_http_image_filter_conf_t, buffer_size), | |
| 139 NULL }, | |
| 140 | |
| 141 ngx_null_command | |
| 142 }; | |
| 143 | |
| 144 | |
| 145 static ngx_http_module_t ngx_http_image_filter_module_ctx = { | |
| 146 NULL, /* preconfiguration */ | |
| 147 ngx_http_image_filter_init, /* postconfiguration */ | |
| 148 | |
| 149 NULL, /* create main configuration */ | |
| 150 NULL, /* init main configuration */ | |
| 151 | |
| 152 NULL, /* create server configuration */ | |
| 153 NULL, /* merge server configuration */ | |
| 154 | |
| 155 ngx_http_image_filter_create_conf, /* create location configuration */ | |
| 156 ngx_http_image_filter_merge_conf /* merge location configuration */ | |
| 157 }; | |
| 158 | |
| 159 | |
| 160 ngx_module_t ngx_http_image_filter_module = { | |
| 161 NGX_MODULE_V1, | |
| 162 &ngx_http_image_filter_module_ctx, /* module context */ | |
| 163 ngx_http_image_filter_commands, /* module directives */ | |
| 164 NGX_HTTP_MODULE, /* module type */ | |
| 165 NULL, /* init master */ | |
| 166 NULL, /* init module */ | |
| 167 NULL, /* init process */ | |
| 168 NULL, /* init thread */ | |
| 169 NULL, /* exit thread */ | |
| 170 NULL, /* exit process */ | |
| 171 NULL, /* exit master */ | |
| 172 NGX_MODULE_V1_PADDING | |
| 173 }; | |
| 174 | |
| 175 | |
| 176 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 177 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 178 | |
| 179 | |
| 180 static ngx_str_t ngx_http_image_types[] = { | |
| 181 ngx_string("image/jpeg"), | |
| 182 ngx_string("image/gif"), | |
| 183 ngx_string("image/png") | |
| 184 }; | |
| 185 | |
| 186 | |
| 187 static ngx_int_t | |
| 188 ngx_http_image_header_filter(ngx_http_request_t *r) | |
| 189 { | |
| 190 off_t len; | |
| 191 ngx_http_image_filter_ctx_t *ctx; | |
| 192 ngx_http_image_filter_conf_t *conf; | |
| 193 | |
| 194 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { | |
| 195 return ngx_http_next_header_filter(r); | |
| 196 } | |
| 197 | |
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198 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); |
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199 |
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200 if (ctx) { |
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201 ngx_http_set_ctx(r, NULL, ngx_http_image_filter_module); |
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202 return ngx_http_next_header_filter(r); |
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203 } |
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204 |
| 2788 | 205 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); |
| 206 | |
| 207 if (conf->filter == NGX_HTTP_IMAGE_OFF) { | |
| 208 return ngx_http_next_header_filter(r); | |
| 209 } | |
| 210 | |
| 211 if (r->headers_out.content_type.len | |
| 212 >= sizeof("multipart/x-mixed-replace") - 1 | |
| 213 && ngx_strncasecmp(r->headers_out.content_type.data, | |
| 214 (u_char *) "multipart/x-mixed-replace", | |
| 215 sizeof("multipart/x-mixed-replace") - 1) | |
| 216 == 0) | |
| 217 { | |
| 218 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 219 "image filter: multipart/x-mixed-replace response"); | |
| 220 | |
| 221 return NGX_ERROR; | |
| 222 } | |
| 223 | |
| 224 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_image_filter_ctx_t)); | |
| 225 if (ctx == NULL) { | |
| 226 return NGX_ERROR; | |
| 227 } | |
| 228 | |
| 229 ngx_http_set_ctx(r, ctx, ngx_http_image_filter_module); | |
| 230 | |
| 231 len = r->headers_out.content_length_n; | |
| 232 | |
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233 if (len != -1 && len > (off_t) conf->buffer_size) { |
| 2788 | 234 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| 235 "image filter: too big response: %O", len); | |
| 236 | |
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237 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE; |
| 2788 | 238 } |
| 239 | |
| 240 if (len == -1) { | |
| 241 ctx->length = conf->buffer_size; | |
| 242 | |
| 243 } else { | |
| 244 ctx->length = (size_t) len; | |
| 245 } | |
| 246 | |
| 247 if (r->headers_out.refresh) { | |
| 248 r->headers_out.refresh->hash = 0; | |
| 249 } | |
| 250 | |
| 251 r->main_filter_need_in_memory = 1; | |
| 252 r->allow_ranges = 0; | |
| 253 | |
| 254 return NGX_OK; | |
| 255 } | |
| 256 | |
| 257 | |
| 258 static ngx_int_t | |
| 259 ngx_http_image_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 260 { | |
| 261 ngx_int_t rc; | |
| 262 ngx_str_t *ct; | |
| 263 ngx_chain_t out; | |
| 264 ngx_http_image_filter_ctx_t *ctx; | |
| 265 ngx_http_image_filter_conf_t *conf; | |
| 266 | |
| 267 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "image filter"); | |
| 268 | |
| 269 if (in == NULL) { | |
| 270 return ngx_http_next_body_filter(r, in); | |
| 271 } | |
| 272 | |
| 273 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); | |
| 274 | |
| 275 if (ctx == NULL) { | |
| 276 return ngx_http_next_body_filter(r, in); | |
| 277 } | |
| 278 | |
| 279 switch (ctx->phase) { | |
| 280 | |
| 281 case NGX_HTTP_IMAGE_START: | |
| 282 | |
| 283 ctx->type = ngx_http_image_test(r, in); | |
| 284 | |
| 285 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); | |
| 286 | |
| 287 if (ctx->type == NGX_HTTP_IMAGE_NONE) { | |
| 288 | |
| 289 if (conf->filter == NGX_HTTP_IMAGE_SIZE) { | |
| 290 out.buf = ngx_http_image_json(r, NULL); | |
| 291 | |
| 292 if (out.buf) { | |
| 293 out.next = NULL; | |
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294 ctx->phase = NGX_HTTP_IMAGE_DONE; |
| 2788 | 295 |
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296 return ngx_http_image_send(r, ctx, &out); |
| 2788 | 297 } |
| 298 } | |
| 299 | |
| 300 return ngx_http_filter_finalize_request(r, | |
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301 &ngx_http_image_filter_module, |
| 2788 | 302 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE); |
| 303 } | |
| 304 | |
| 305 /* override content type */ | |
| 306 | |
| 307 ct = &ngx_http_image_types[ctx->type - 1]; | |
| 308 r->headers_out.content_type_len = ct->len; | |
| 309 r->headers_out.content_type = *ct; | |
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310 r->headers_out.content_type_lowcase = NULL; |
| 2788 | 311 |
| 312 if (conf->filter == NGX_HTTP_IMAGE_TEST) { | |
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313 ctx->phase = NGX_HTTP_IMAGE_PASS; |
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314 |
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315 return ngx_http_image_send(r, ctx, in); |
| 2788 | 316 } |
| 317 | |
| 318 ctx->phase = NGX_HTTP_IMAGE_READ; | |
| 319 | |
| 320 /* fall through */ | |
| 321 | |
| 322 case NGX_HTTP_IMAGE_READ: | |
| 323 | |
| 324 rc = ngx_http_image_read(r, in); | |
| 325 | |
| 326 if (rc == NGX_AGAIN) { | |
| 327 return NGX_OK; | |
| 328 } | |
| 329 | |
| 330 if (rc == NGX_ERROR) { | |
| 331 return ngx_http_filter_finalize_request(r, | |
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332 &ngx_http_image_filter_module, |
| 2788 | 333 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE); |
| 334 } | |
| 335 | |
| 336 /* fall through */ | |
| 337 | |
| 338 case NGX_HTTP_IMAGE_PROCESS: | |
| 339 | |
| 340 out.buf = ngx_http_image_process(r); | |
| 341 | |
| 342 if (out.buf == NULL) { | |
| 343 return ngx_http_filter_finalize_request(r, | |
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344 &ngx_http_image_filter_module, |
| 2788 | 345 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE); |
| 346 } | |
| 347 | |
| 348 out.next = NULL; | |
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349 ctx->phase = NGX_HTTP_IMAGE_PASS; |
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350 |
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351 return ngx_http_image_send(r, ctx, &out); |
| 2788 | 352 |
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353 case NGX_HTTP_IMAGE_PASS: |
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354 |
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355 return ngx_http_next_body_filter(r, in); |
| 2788 | 356 |
| 357 default: /* NGX_HTTP_IMAGE_DONE */ | |
| 358 | |
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359 rc = ngx_http_next_body_filter(r, NULL); |
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360 |
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361 /* NGX_ERROR resets any pending data */ |
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362 return (rc == NGX_OK) ? NGX_ERROR : rc; |
| 2788 | 363 } |
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364 } |
| 2788 | 365 |
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366 |
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367 static ngx_int_t |
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368 ngx_http_image_send(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx, |
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369 ngx_chain_t *in) |
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370 { |
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371 ngx_int_t rc; |
| 2788 | 372 |
| 373 rc = ngx_http_next_header_filter(r); | |
| 374 | |
| 375 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
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376 return NGX_ERROR; |
| 2788 | 377 } |
| 378 | |
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379 rc = ngx_http_next_body_filter(r, in); |
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380 |
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381 if (ctx->phase == NGX_HTTP_IMAGE_DONE) { |
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382 /* NGX_ERROR resets any pending data */ |
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383 return (rc == NGX_OK) ? NGX_ERROR : rc; |
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384 } |
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385 |
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386 return rc; |
| 2788 | 387 } |
| 388 | |
| 389 | |
| 390 static ngx_uint_t | |
| 391 ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in) | |
| 392 { | |
| 393 u_char *p; | |
| 394 | |
| 395 p = in->buf->pos; | |
| 396 | |
| 397 if (in->buf->last - p < 16) { | |
| 398 return NGX_HTTP_IMAGE_NONE; | |
| 399 } | |
| 400 | |
| 401 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 402 "image filter: \"%c%c\"", p[0], p[1]); | |
| 403 | |
| 404 if (p[0] == 0xff && p[1] == 0xd8) { | |
| 405 | |
| 406 /* JPEG */ | |
| 407 | |
| 408 return NGX_HTTP_IMAGE_JPEG; | |
| 409 | |
| 410 } else if (p[0] == 'G' && p[1] == 'I' && p[2] == 'F' && p[3] == '8' | |
| 2918 | 411 && p[5] == 'a') |
| 2788 | 412 { |
| 2918 | 413 if (p[4] == '9' || p[4] == '7') { |
| 414 /* GIF */ | |
| 415 return NGX_HTTP_IMAGE_GIF; | |
| 416 } | |
| 2788 | 417 |
| 418 } else if (p[0] == 0x89 && p[1] == 'P' && p[2] == 'N' && p[3] == 'G' | |
| 419 && p[4] == 0x0d && p[5] == 0x0a && p[6] == 0x1a && p[7] == 0x0a) | |
| 420 { | |
| 421 /* PNG */ | |
| 422 | |
| 423 return NGX_HTTP_IMAGE_PNG; | |
| 424 } | |
| 425 | |
| 426 return NGX_HTTP_IMAGE_NONE; | |
| 427 } | |
| 428 | |
| 429 | |
| 430 static ngx_int_t | |
| 431 ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in) | |
| 432 { | |
| 433 u_char *p; | |
| 434 size_t size, rest; | |
| 435 ngx_buf_t *b; | |
| 436 ngx_chain_t *cl; | |
| 437 ngx_http_image_filter_ctx_t *ctx; | |
| 438 | |
| 439 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); | |
| 440 | |
| 441 if (ctx->image == NULL) { | |
| 442 ctx->image = ngx_palloc(r->pool, ctx->length); | |
| 443 if (ctx->image == NULL) { | |
| 444 return NGX_ERROR; | |
| 445 } | |
| 446 | |
| 447 ctx->last = ctx->image; | |
| 448 } | |
| 449 | |
| 450 p = ctx->last; | |
| 451 | |
| 452 for (cl = in; cl; cl = cl->next) { | |
| 453 | |
| 454 b = cl->buf; | |
| 455 size = b->last - b->pos; | |
| 456 | |
| 457 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 458 "image buf: %uz", size); | |
| 459 | |
| 460 rest = ctx->image + ctx->length - p; | |
| 461 size = (rest < size) ? rest : size; | |
| 462 | |
| 463 p = ngx_cpymem(p, b->pos, size); | |
| 464 b->pos += size; | |
| 465 | |
| 466 if (b->last_buf) { | |
| 467 ctx->last = p; | |
| 468 return NGX_OK; | |
| 469 } | |
| 470 } | |
| 471 | |
| 472 ctx->last = p; | |
| 473 r->connection->buffered |= NGX_HTTP_IMAGE_BUFFERED; | |
| 474 | |
| 475 return NGX_AGAIN; | |
| 476 } | |
| 477 | |
| 478 | |
| 479 static ngx_buf_t * | |
| 480 ngx_http_image_process(ngx_http_request_t *r) | |
| 481 { | |
| 482 ngx_int_t rc; | |
| 483 ngx_http_image_filter_ctx_t *ctx; | |
| 484 ngx_http_image_filter_conf_t *conf; | |
| 485 | |
| 486 r->connection->buffered &= ~NGX_HTTP_IMAGE_BUFFERED; | |
| 487 | |
| 488 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module); | |
| 489 | |
| 490 rc = ngx_http_image_size(r, ctx); | |
| 491 | |
| 492 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); | |
| 493 | |
| 494 if (conf->filter == NGX_HTTP_IMAGE_SIZE) { | |
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495 return ngx_http_image_json(r, rc == NGX_OK ? ctx : NULL); |
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496 } |
| 2788 | 497 |
| 3878 | 498 ctx->angle = ngx_http_image_filter_get_value(r, conf->acv, conf->angle); |
| 499 | |
| 500 if (conf->filter == NGX_HTTP_IMAGE_ROTATE) { | |
| 501 | |
| 502 if (ctx->angle != 90 && ctx->angle != 180 && ctx->angle != 270) { | |
| 503 return NULL; | |
| 504 } | |
| 505 | |
| 506 return ngx_http_image_resize(r, ctx); | |
| 507 } | |
| 508 | |
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509 ctx->max_width = ngx_http_image_filter_get_value(r, conf->wcv, conf->width); |
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510 if (ctx->max_width == 0) { |
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511 return NULL; |
| 2788 | 512 } |
| 513 | |
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514 ctx->max_height = ngx_http_image_filter_get_value(r, conf->hcv, |
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515 conf->height); |
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516 if (ctx->max_height == 0) { |
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517 return NULL; |
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518 } |
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519 |
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520 if (rc == NGX_OK |
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521 && ctx->width <= ctx->max_width |
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522 && ctx->height <= ctx->max_height |
| 3878 | 523 && ctx->angle == 0 |
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524 && !ctx->force) |
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525 { |
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526 return ngx_http_image_asis(r, ctx); |
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527 } |
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528 |
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529 return ngx_http_image_resize(r, ctx); |
| 2788 | 530 } |
| 531 | |
| 532 | |
| 533 static ngx_buf_t * | |
| 534 ngx_http_image_json(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 535 { | |
| 536 size_t len; | |
| 537 ngx_buf_t *b; | |
| 538 | |
| 539 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 540 if (b == NULL) { | |
| 541 return NULL; | |
| 542 } | |
| 543 | |
| 544 b->memory = 1; | |
| 545 b->last_buf = 1; | |
| 546 | |
| 547 ngx_http_clean_header(r); | |
| 548 | |
| 549 r->headers_out.status = NGX_HTTP_OK; | |
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550 ngx_str_set(&r->headers_out.content_type, "text/plain"); |
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551 r->headers_out.content_type_lowcase = NULL; |
| 2788 | 552 |
| 553 if (ctx == NULL) { | |
| 554 b->pos = (u_char *) "{}" CRLF; | |
| 555 b->last = b->pos + sizeof("{}" CRLF) - 1; | |
| 556 | |
| 557 ngx_http_image_length(r, b); | |
| 558 | |
| 559 return b; | |
| 560 } | |
| 561 | |
| 562 len = sizeof("{ \"img\" : " | |
| 563 "{ \"width\": , \"height\": , \"type\": \"jpeg\" } }" CRLF) - 1 | |
| 564 + 2 * NGX_SIZE_T_LEN; | |
| 565 | |
| 566 b->pos = ngx_pnalloc(r->pool, len); | |
| 567 if (b->pos == NULL) { | |
| 568 return NULL; | |
| 569 } | |
| 570 | |
| 571 b->last = ngx_sprintf(b->pos, | |
| 572 "{ \"img\" : " | |
| 573 "{ \"width\": %uz," | |
| 574 " \"height\": %uz," | |
| 575 " \"type\": \"%s\" } }" CRLF, | |
| 576 ctx->width, ctx->height, | |
| 577 ngx_http_image_types[ctx->type - 1].data + 6); | |
| 578 | |
| 579 ngx_http_image_length(r, b); | |
| 580 | |
| 581 return b; | |
| 582 } | |
| 583 | |
| 584 | |
| 585 static ngx_buf_t * | |
| 586 ngx_http_image_asis(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 587 { | |
| 588 ngx_buf_t *b; | |
| 589 | |
| 590 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 591 if (b == NULL) { | |
| 592 return NULL; | |
| 593 } | |
| 594 | |
| 595 b->pos = ctx->image; | |
| 596 b->last = ctx->last; | |
| 597 b->memory = 1; | |
| 598 b->last_buf = 1; | |
| 599 | |
| 600 ngx_http_image_length(r, b); | |
| 601 | |
| 602 return b; | |
| 603 } | |
| 604 | |
| 605 | |
| 606 static void | |
| 607 ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b) | |
| 608 { | |
| 609 r->headers_out.content_length_n = b->last - b->pos; | |
| 610 | |
| 611 if (r->headers_out.content_length) { | |
| 612 r->headers_out.content_length->hash = 0; | |
| 613 } | |
| 614 | |
| 615 r->headers_out.content_length = NULL; | |
| 616 } | |
| 617 | |
| 618 | |
| 619 static ngx_int_t | |
| 620 ngx_http_image_size(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 621 { | |
| 622 u_char *p, *last; | |
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623 size_t len, app; |
| 2788 | 624 ngx_uint_t width, height; |
| 625 | |
| 626 p = ctx->image; | |
| 627 | |
| 628 switch (ctx->type) { | |
| 629 | |
| 630 case NGX_HTTP_IMAGE_JPEG: | |
| 631 | |
| 632 p += 2; | |
| 633 last = ctx->image + ctx->length - 10; | |
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634 width = 0; |
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635 height = 0; |
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636 app = 0; |
| 2788 | 637 |
| 638 while (p < last) { | |
| 639 | |
| 640 if (p[0] == 0xff && p[1] != 0xff) { | |
| 641 | |
| 642 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 3393 | 643 "JPEG: %02xd %02xd", p[0], p[1]); |
| 2788 | 644 |
| 645 p++; | |
| 646 | |
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647 if ((*p == 0xc0 || *p == 0xc1 || *p == 0xc2 || *p == 0xc3 |
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648 || *p == 0xc9 || *p == 0xca || *p == 0xcb) |
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649 && (width == 0 || height == 0)) |
| 2788 | 650 { |
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651 width = p[6] * 256 + p[7]; |
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652 height = p[4] * 256 + p[5]; |
| 2788 | 653 } |
| 654 | |
| 655 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 656 "JPEG: %02xd %02xd", p[1], p[2]); | |
| 657 | |
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658 len = p[1] * 256 + p[2]; |
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659 |
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660 if (*p >= 0xe1 && *p <= 0xef) { |
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661 /* application data, e.g., EXIF, Adobe XMP, etc. */ |
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662 app += len; |
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663 } |
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664 |
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665 p += len; |
| 2788 | 666 |
| 667 continue; | |
| 668 } | |
| 669 | |
| 670 p++; | |
| 671 } | |
| 672 | |
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673 if (width == 0 || height == 0) { |
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674 return NGX_DECLINED; |
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675 } |
| 2788 | 676 |
|
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677 if (ctx->length / 20 < app) { |
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678 /* force conversion if application data consume more than 5% */ |
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679 ctx->force = 1; |
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680 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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681 "app data size: %uz", app); |
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682 } |
| 2788 | 683 |
| 684 break; | |
| 685 | |
| 686 case NGX_HTTP_IMAGE_GIF: | |
| 687 | |
| 688 if (ctx->length < 10) { | |
| 689 return NGX_DECLINED; | |
| 690 } | |
| 691 | |
| 692 width = p[7] * 256 + p[6]; | |
| 693 height = p[9] * 256 + p[8]; | |
| 694 | |
| 695 break; | |
| 696 | |
| 697 case NGX_HTTP_IMAGE_PNG: | |
| 698 | |
| 699 if (ctx->length < 24) { | |
| 700 return NGX_DECLINED; | |
| 701 } | |
| 702 | |
| 703 width = p[18] * 256 + p[19]; | |
| 704 height = p[22] * 256 + p[23]; | |
| 705 | |
| 706 break; | |
| 707 | |
| 708 default: | |
| 709 | |
| 710 return NGX_DECLINED; | |
| 711 } | |
| 712 | |
| 713 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 714 "image size: %d x %d", width, height); | |
| 715 | |
| 716 ctx->width = width; | |
| 717 ctx->height = height; | |
| 718 | |
| 719 return NGX_OK; | |
| 720 } | |
| 721 | |
| 722 | |
| 723 static ngx_buf_t * | |
| 724 ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 725 { | |
|
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726 int sx, sy, dx, dy, ox, oy, ax, ay, size, |
| 3134 | 727 colors, palette, transparent, |
| 3878 | 728 red, green, blue, t; |
| 2788 | 729 u_char *out; |
| 730 ngx_buf_t *b; | |
| 731 ngx_uint_t resize; | |
| 732 gdImagePtr src, dst; | |
| 733 ngx_pool_cleanup_t *cln; | |
| 734 ngx_http_image_filter_conf_t *conf; | |
| 735 | |
| 736 src = ngx_http_image_source(r, ctx); | |
| 737 | |
| 738 if (src == NULL) { | |
| 739 return NULL; | |
| 740 } | |
| 741 | |
| 742 sx = gdImageSX(src); | |
| 743 sy = gdImageSY(src); | |
| 744 | |
| 745 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); | |
| 746 | |
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747 if (!ctx->force |
| 3878 | 748 && ctx->angle == 0 |
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749 && (ngx_uint_t) sx <= ctx->max_width |
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750 && (ngx_uint_t) sy <= ctx->max_height) |
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751 { |
| 2788 | 752 gdImageDestroy(src); |
| 753 return ngx_http_image_asis(r, ctx); | |
| 754 } | |
| 755 | |
| 756 colors = gdImageColorsTotal(src); | |
| 3134 | 757 |
| 758 if (colors && conf->transparency) { | |
| 759 transparent = gdImageGetTransparent(src); | |
| 760 | |
| 761 if (transparent != -1) { | |
| 762 palette = colors; | |
| 763 red = gdImageRed(src, transparent); | |
| 764 green = gdImageGreen(src, transparent); | |
| 765 blue = gdImageBlue(src, transparent); | |
| 2788 | 766 |
| 3134 | 767 goto transparent; |
| 768 } | |
| 769 } | |
| 3117 | 770 |
| 3134 | 771 palette = 0; |
| 772 transparent = -1; | |
| 773 red = 0; | |
| 774 green = 0; | |
| 775 blue = 0; | |
| 776 | |
| 777 transparent: | |
| 778 | |
| 779 gdImageColorTransparent(src, -1); | |
| 3117 | 780 |
| 2788 | 781 dx = sx; |
| 782 dy = sy; | |
| 783 | |
| 784 if (conf->filter == NGX_HTTP_IMAGE_RESIZE) { | |
| 785 | |
|
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786 if ((ngx_uint_t) dx > ctx->max_width) { |
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787 dy = dy * ctx->max_width / dx; |
| 2788 | 788 dy = dy ? dy : 1; |
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789 dx = ctx->max_width; |
| 2788 | 790 } |
| 791 | |
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792 if ((ngx_uint_t) dy > ctx->max_height) { |
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793 dx = dx * ctx->max_height / dy; |
| 2788 | 794 dx = dx ? dx : 1; |
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795 dy = ctx->max_height; |
| 2788 | 796 } |
| 797 | |
| 798 resize = 1; | |
| 799 | |
| 3878 | 800 } else if (conf->filter == NGX_HTTP_IMAGE_ROTATE) { |
| 801 | |
| 802 resize = 0; | |
| 803 | |
| 2788 | 804 } else { /* NGX_HTTP_IMAGE_CROP */ |
| 805 | |
| 806 resize = 0; | |
| 807 | |
|
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808 if ((ngx_uint_t) (dx * 100 / dy) |
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809 < ctx->max_width * 100 / ctx->max_height) |
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810 { |
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811 if ((ngx_uint_t) dx > ctx->max_width) { |
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812 dy = dy * ctx->max_width / dx; |
| 2788 | 813 dy = dy ? dy : 1; |
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814 dx = ctx->max_width; |
| 2788 | 815 resize = 1; |
| 816 } | |
| 817 | |
| 818 } else { | |
|
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819 if ((ngx_uint_t) dy > ctx->max_height) { |
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820 dx = dx * ctx->max_height / dy; |
| 2788 | 821 dx = dx ? dx : 1; |
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822 dy = ctx->max_height; |
| 2788 | 823 resize = 1; |
| 824 } | |
| 825 } | |
| 826 } | |
| 827 | |
| 828 if (resize) { | |
| 3134 | 829 dst = ngx_http_image_new(r, dx, dy, palette); |
| 2788 | 830 if (dst == NULL) { |
| 831 gdImageDestroy(src); | |
| 832 return NULL; | |
| 833 } | |
| 834 | |
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835 if (colors == 0) { |
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836 gdImageSaveAlpha(dst, 1); |
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837 gdImageAlphaBlending(dst, 0); |
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838 } |
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839 |
| 2788 | 840 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy); |
| 841 | |
| 3134 | 842 if (colors) { |
| 843 gdImageTrueColorToPalette(dst, 1, 256); | |
| 844 } | |
| 845 | |
| 2788 | 846 gdImageDestroy(src); |
| 847 | |
| 848 } else { | |
| 849 dst = src; | |
| 850 } | |
| 851 | |
| 3878 | 852 if (ctx->angle) { |
| 853 src = dst; | |
| 854 | |
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855 ax = (dx % 2 == 0) ? 1 : 0; |
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856 ay = (dy % 2 == 0) ? 1 : 0; |
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857 |
| 3878 | 858 switch (ctx->angle) { |
| 859 | |
| 860 case 90: | |
| 861 case 270: | |
| 862 dst = ngx_http_image_new(r, dy, dx, palette); | |
| 863 if (dst == NULL) { | |
| 864 gdImageDestroy(src); | |
| 865 return NULL; | |
| 866 } | |
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867 if (ctx->angle == 90) { |
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868 ox = dy / 2 + ay; |
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869 oy = dx / 2 - ax; |
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870 |
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871 } else { |
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872 ox = dy / 2 - ay; |
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873 oy = dx / 2 + ax; |
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874 } |
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875 |
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876 gdImageCopyRotated(dst, src, ox, oy, 0, 0, |
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877 dx + ax, dy + ay, ctx->angle); |
| 3878 | 878 gdImageDestroy(src); |
|
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879 |
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880 t = dx; |
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881 dx = dy; |
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882 dy = t; |
| 3878 | 883 break; |
| 884 | |
| 885 case 180: | |
| 886 dst = ngx_http_image_new(r, dx, dy, palette); | |
| 887 if (dst == NULL) { | |
| 888 gdImageDestroy(src); | |
| 889 return NULL; | |
| 890 } | |
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891 gdImageCopyRotated(dst, src, dx / 2 - ax, dy / 2 - ay, 0, 0, |
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892 dx + ax, dy + ay, ctx->angle); |
| 3878 | 893 gdImageDestroy(src); |
| 894 break; | |
| 895 } | |
| 896 } | |
| 897 | |
| 2788 | 898 if (conf->filter == NGX_HTTP_IMAGE_CROP) { |
| 899 | |
| 900 src = dst; | |
| 901 | |
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902 if ((ngx_uint_t) dx > ctx->max_width) { |
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903 ox = dx - ctx->max_width; |
| 2788 | 904 |
| 905 } else { | |
| 906 ox = 0; | |
| 907 } | |
| 908 | |
|
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909 if ((ngx_uint_t) dy > ctx->max_height) { |
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910 oy = dy - ctx->max_height; |
| 2788 | 911 |
| 912 } else { | |
| 913 oy = 0; | |
| 914 } | |
| 915 | |
| 916 if (ox || oy) { | |
| 917 | |
| 918 dst = ngx_http_image_new(r, dx - ox, dy - oy, colors); | |
| 919 | |
| 920 if (dst == NULL) { | |
| 921 gdImageDestroy(src); | |
| 922 return NULL; | |
| 923 } | |
| 924 | |
| 925 ox /= 2; | |
| 926 oy /= 2; | |
| 927 | |
| 928 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 929 "image crop: %d x %d @ %d x %d", | |
| 930 dx, dy, ox, oy); | |
| 931 | |
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932 if (colors == 0) { |
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933 gdImageSaveAlpha(dst, 1); |
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934 gdImageAlphaBlending(dst, 0); |
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935 } |
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936 |
| 2788 | 937 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy); |
| 938 | |
| 3134 | 939 if (colors) { |
| 940 gdImageTrueColorToPalette(dst, 1, 256); | |
| 941 } | |
| 942 | |
| 2788 | 943 gdImageDestroy(src); |
| 944 } | |
| 945 } | |
| 946 | |
| 3117 | 947 if (transparent != -1 && colors) { |
| 948 gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue)); | |
| 949 } | |
| 2788 | 950 |
| 951 out = ngx_http_image_out(r, ctx->type, dst, &size); | |
| 952 | |
| 953 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 954 "image: %d x %d %d", sx, sy, colors); | |
| 955 | |
| 956 gdImageDestroy(dst); | |
| 957 ngx_pfree(r->pool, ctx->image); | |
| 958 | |
| 959 if (out == NULL) { | |
| 960 return NULL; | |
| 961 } | |
| 962 | |
| 963 cln = ngx_pool_cleanup_add(r->pool, 0); | |
| 964 if (cln == NULL) { | |
| 965 gdFree(out); | |
| 966 return NULL; | |
| 967 } | |
| 968 | |
| 969 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
| 970 if (b == NULL) { | |
| 971 gdFree(out); | |
| 972 return NULL; | |
| 973 } | |
| 974 | |
| 975 cln->handler = ngx_http_image_cleanup; | |
| 976 cln->data = out; | |
| 977 | |
| 978 b->pos = out; | |
| 979 b->last = out + size; | |
| 980 b->memory = 1; | |
| 981 b->last_buf = 1; | |
| 982 | |
| 983 ngx_http_image_length(r, b); | |
| 984 | |
| 985 return b; | |
| 986 } | |
| 987 | |
| 988 | |
| 989 static gdImagePtr | |
| 990 ngx_http_image_source(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx) | |
| 991 { | |
| 992 char *failed; | |
| 993 gdImagePtr img; | |
| 994 | |
| 995 img = NULL; | |
| 996 | |
| 997 switch (ctx->type) { | |
| 998 | |
| 999 case NGX_HTTP_IMAGE_JPEG: | |
| 1000 img = gdImageCreateFromJpegPtr(ctx->length, ctx->image); | |
| 1001 failed = "gdImageCreateFromJpegPtr() failed"; | |
| 1002 break; | |
| 1003 | |
| 1004 case NGX_HTTP_IMAGE_GIF: | |
| 1005 img = gdImageCreateFromGifPtr(ctx->length, ctx->image); | |
| 1006 failed = "gdImageCreateFromGifPtr() failed"; | |
| 1007 break; | |
| 1008 | |
| 1009 case NGX_HTTP_IMAGE_PNG: | |
| 1010 img = gdImageCreateFromPngPtr(ctx->length, ctx->image); | |
| 1011 failed = "gdImageCreateFromPngPtr() failed"; | |
| 1012 break; | |
| 1013 | |
| 1014 default: | |
| 1015 failed = "unknown image type"; | |
| 1016 break; | |
| 1017 } | |
| 1018 | |
| 1019 if (img == NULL) { | |
| 1020 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed); | |
| 1021 } | |
| 1022 | |
| 1023 return img; | |
| 1024 } | |
| 1025 | |
| 1026 | |
| 1027 static gdImagePtr | |
| 1028 ngx_http_image_new(ngx_http_request_t *r, int w, int h, int colors) | |
| 1029 { | |
| 1030 gdImagePtr img; | |
| 1031 | |
| 1032 if (colors == 0) { | |
| 1033 img = gdImageCreateTrueColor(w, h); | |
| 1034 | |
| 1035 if (img == NULL) { | |
| 1036 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 1037 "gdImageCreateTrueColor() failed"); | |
| 1038 return NULL; | |
| 1039 } | |
| 1040 | |
| 1041 } else { | |
| 1042 img = gdImageCreate(w, h); | |
| 1043 | |
| 1044 if (img == NULL) { | |
| 1045 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 1046 "gdImageCreate() failed"); | |
| 1047 return NULL; | |
| 1048 } | |
| 1049 } | |
| 1050 | |
| 1051 return img; | |
| 1052 } | |
| 1053 | |
| 1054 | |
| 1055 static u_char * | |
| 1056 ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, gdImagePtr img, | |
| 1057 int *size) | |
| 1058 { | |
| 2848 | 1059 char *failed; |
| 1060 u_char *out; | |
|
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1061 ngx_int_t jq; |
| 2848 | 1062 ngx_http_image_filter_conf_t *conf; |
| 2788 | 1063 |
| 1064 out = NULL; | |
| 1065 | |
| 1066 switch (type) { | |
| 1067 | |
| 1068 case NGX_HTTP_IMAGE_JPEG: | |
| 2848 | 1069 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module); |
|
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1070 |
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1071 jq = ngx_http_image_filter_get_value(r, conf->jqcv, conf->jpeg_quality); |
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1072 if (jq <= 0) { |
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1073 return NULL; |
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1074 } |
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1075 |
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1076 out = gdImageJpegPtr(img, size, jq); |
| 2788 | 1077 failed = "gdImageJpegPtr() failed"; |
| 1078 break; | |
| 1079 | |
| 1080 case NGX_HTTP_IMAGE_GIF: | |
| 1081 out = gdImageGifPtr(img, size); | |
| 1082 failed = "gdImageGifPtr() failed"; | |
| 1083 break; | |
| 1084 | |
| 1085 case NGX_HTTP_IMAGE_PNG: | |
| 1086 out = gdImagePngPtr(img, size); | |
| 1087 failed = "gdImagePngPtr() failed"; | |
| 1088 break; | |
| 1089 | |
| 1090 default: | |
| 1091 failed = "unknown image type"; | |
| 1092 break; | |
| 1093 } | |
| 1094 | |
| 1095 if (out == NULL) { | |
| 1096 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed); | |
| 1097 } | |
| 1098 | |
| 1099 return out; | |
| 1100 } | |
| 1101 | |
| 1102 | |
| 1103 static void | |
| 1104 ngx_http_image_cleanup(void *data) | |
| 1105 { | |
| 1106 gdFree(data); | |
| 1107 } | |
| 1108 | |
| 1109 | |
|
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1110 static ngx_uint_t |
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1111 ngx_http_image_filter_get_value(ngx_http_request_t *r, |
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1112 ngx_http_complex_value_t *cv, ngx_uint_t v) |
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1113 { |
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1114 ngx_str_t val; |
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1115 |
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1116 if (cv == NULL) { |
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1117 return v; |
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1118 } |
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1119 |
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1120 if (ngx_http_complex_value(r, cv, &val) != NGX_OK) { |
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1121 return 0; |
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1122 } |
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1123 |
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1124 return ngx_http_image_filter_value(&val); |
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1125 } |
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1126 |
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1127 |
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1128 static ngx_uint_t |
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1129 ngx_http_image_filter_value(ngx_str_t *value) |
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1130 { |
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1131 ngx_int_t n; |
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1132 |
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1133 if (value->len == 1 && value->data[0] == '-') { |
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1134 return (ngx_uint_t) -1; |
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1135 } |
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1136 |
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1137 n = ngx_atoi(value->data, value->len); |
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1138 |
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1139 if (n > 0) { |
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1140 return (ngx_uint_t) n; |
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1141 } |
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1142 |
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1143 return 0; |
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1144 } |
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1145 |
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1146 |
| 2788 | 1147 static void * |
| 1148 ngx_http_image_filter_create_conf(ngx_conf_t *cf) | |
| 1149 { | |
| 1150 ngx_http_image_filter_conf_t *conf; | |
| 1151 | |
| 1152 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t)); | |
| 1153 if (conf == NULL) { | |
|
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1154 return NULL; |
| 2788 | 1155 } |
| 1156 | |
| 1157 conf->filter = NGX_CONF_UNSET_UINT; | |
|
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1158 conf->jpeg_quality = NGX_CONF_UNSET_UINT; |
| 3878 | 1159 conf->angle = NGX_CONF_UNSET_UINT; |
| 3134 | 1160 conf->transparency = NGX_CONF_UNSET; |
| 2788 | 1161 conf->buffer_size = NGX_CONF_UNSET_SIZE; |
| 1162 | |
| 1163 return conf; | |
| 1164 } | |
| 1165 | |
| 1166 | |
| 1167 static char * | |
| 1168 ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 1169 { | |
| 1170 ngx_http_image_filter_conf_t *prev = parent; | |
| 1171 ngx_http_image_filter_conf_t *conf = child; | |
| 1172 | |
| 1173 if (conf->filter == NGX_CONF_UNSET_UINT) { | |
| 1174 | |
| 1175 if (prev->filter == NGX_CONF_UNSET_UINT) { | |
| 1176 conf->filter = NGX_HTTP_IMAGE_OFF; | |
| 1177 | |
| 1178 } else { | |
| 1179 conf->filter = prev->filter; | |
| 1180 conf->width = prev->width; | |
| 1181 conf->height = prev->height; | |
|
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1182 conf->wcv = prev->wcv; |
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1183 conf->hcv = prev->hcv; |
| 2788 | 1184 } |
| 1185 } | |
| 1186 | |
| 2848 | 1187 /* 75 is libjpeg default quality */ |
|
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1188 ngx_conf_merge_uint_value(conf->jpeg_quality, prev->jpeg_quality, 75); |
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1189 |
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1190 if (conf->jqcv == NULL) { |
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1191 conf->jqcv = prev->jqcv; |
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1192 } |
| 2848 | 1193 |
| 3878 | 1194 ngx_conf_merge_uint_value(conf->angle, prev->angle, 0); |
| 1195 if (conf->acv == NULL) { | |
| 1196 conf->acv = prev->acv; | |
| 1197 } | |
| 1198 | |
| 3134 | 1199 ngx_conf_merge_value(conf->transparency, prev->transparency, 1); |
| 1200 | |
| 2788 | 1201 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, |
| 1202 1 * 1024 * 1024); | |
| 1203 | |
| 1204 return NGX_CONF_OK; | |
| 1205 } | |
| 1206 | |
| 1207 | |
| 1208 static char * | |
| 1209 ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 1210 { | |
| 1211 ngx_http_image_filter_conf_t *imcf = conf; | |
| 1212 | |
|
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1213 ngx_str_t *value; |
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1214 ngx_int_t n; |
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1215 ngx_uint_t i; |
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1216 ngx_http_complex_value_t cv; |
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1217 ngx_http_compile_complex_value_t ccv; |
| 2788 | 1218 |
| 1219 value = cf->args->elts; | |
| 1220 | |
| 1221 i = 1; | |
| 1222 | |
| 1223 if (cf->args->nelts == 2) { | |
| 1224 if (ngx_strcmp(value[i].data, "off") == 0) { | |
| 1225 imcf->filter = NGX_HTTP_IMAGE_OFF; | |
| 1226 | |
| 1227 } else if (ngx_strcmp(value[i].data, "test") == 0) { | |
| 1228 imcf->filter = NGX_HTTP_IMAGE_TEST; | |
| 1229 | |
| 1230 } else if (ngx_strcmp(value[i].data, "size") == 0) { | |
| 1231 imcf->filter = NGX_HTTP_IMAGE_SIZE; | |
| 1232 | |
| 1233 } else { | |
| 1234 goto failed; | |
| 1235 } | |
| 1236 | |
| 1237 return NGX_CONF_OK; | |
| 3878 | 1238 |
| 1239 } else if (cf->args->nelts == 3) { | |
| 1240 | |
| 1241 if (ngx_strcmp(value[i].data, "rotate") == 0) { | |
| 1242 imcf->filter = NGX_HTTP_IMAGE_ROTATE; | |
| 1243 | |
| 1244 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); | |
| 1245 | |
| 1246 ccv.cf = cf; | |
| 1247 ccv.value = &value[++i]; | |
| 1248 ccv.complex_value = &cv; | |
| 1249 | |
| 1250 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { | |
| 1251 return NGX_CONF_ERROR; | |
| 1252 } | |
| 1253 | |
| 1254 if (cv.lengths == NULL) { | |
| 1255 n = ngx_http_image_filter_value(&value[i]); | |
| 1256 | |
| 1257 if (n != 90 && n != 180 && n != 270) { | |
| 1258 goto failed; | |
| 1259 } | |
| 1260 | |
| 1261 imcf->angle = (ngx_uint_t) n; | |
| 1262 | |
| 1263 } else { | |
| 1264 imcf->acv = ngx_palloc(cf->pool, | |
| 1265 sizeof(ngx_http_complex_value_t)); | |
| 1266 if (imcf->acv == NULL) { | |
| 1267 return NGX_CONF_ERROR; | |
| 1268 } | |
| 1269 | |
| 1270 *imcf->acv = cv; | |
| 1271 } | |
| 1272 | |
| 1273 return NGX_CONF_OK; | |
| 1274 | |
| 1275 } else { | |
| 1276 goto failed; | |
| 1277 } | |
| 2788 | 1278 } |
| 1279 | |
| 1280 if (ngx_strcmp(value[i].data, "resize") == 0) { | |
| 1281 imcf->filter = NGX_HTTP_IMAGE_RESIZE; | |
| 1282 | |
| 1283 } else if (ngx_strcmp(value[i].data, "crop") == 0) { | |
| 1284 imcf->filter = NGX_HTTP_IMAGE_CROP; | |
| 1285 | |
| 1286 } else { | |
| 1287 goto failed; | |
| 1288 } | |
| 1289 | |
|
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1290 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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1291 |
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1292 ccv.cf = cf; |
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1293 ccv.value = &value[++i]; |
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1294 ccv.complex_value = &cv; |
| 2788 | 1295 |
|
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1296 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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1297 return NGX_CONF_ERROR; |
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1298 } |
| 2788 | 1299 |
|
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1300 if (cv.lengths == NULL) { |
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1301 n = ngx_http_image_filter_value(&value[i]); |
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1302 |
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1303 if (n == 0) { |
| 2788 | 1304 goto failed; |
| 1305 } | |
| 1306 | |
| 1307 imcf->width = (ngx_uint_t) n; | |
|
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1308 |
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1309 } else { |
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1310 imcf->wcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
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1311 if (imcf->wcv == NULL) { |
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1312 return NGX_CONF_ERROR; |
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1313 } |
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1314 |
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1315 *imcf->wcv = cv; |
| 2788 | 1316 } |
| 1317 | |
|
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1318 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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1319 |
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1320 ccv.cf = cf; |
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1321 ccv.value = &value[++i]; |
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1322 ccv.complex_value = &cv; |
| 2788 | 1323 |
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1324 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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1325 return NGX_CONF_ERROR; |
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1326 } |
| 2788 | 1327 |
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1328 if (cv.lengths == NULL) { |
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1329 n = ngx_http_image_filter_value(&value[i]); |
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1330 |
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1331 if (n == 0) { |
| 2788 | 1332 goto failed; |
| 1333 } | |
| 1334 | |
| 1335 imcf->height = (ngx_uint_t) n; | |
|
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1336 |
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1337 } else { |
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1338 imcf->hcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
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1339 if (imcf->hcv == NULL) { |
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1340 return NGX_CONF_ERROR; |
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1341 } |
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1342 |
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1343 *imcf->hcv = cv; |
| 2788 | 1344 } |
| 1345 | |
| 1346 return NGX_CONF_OK; | |
| 1347 | |
| 1348 failed: | |
| 1349 | |
| 1350 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", | |
| 1351 &value[i]); | |
| 1352 | |
| 1353 return NGX_CONF_ERROR; | |
| 1354 } | |
| 1355 | |
| 1356 | |
|
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1357 static char * |
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1358 ngx_http_image_filter_jpeg_quality(ngx_conf_t *cf, ngx_command_t *cmd, |
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1359 void *conf) |
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1360 { |
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1361 ngx_http_image_filter_conf_t *imcf = conf; |
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1362 |
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1363 ngx_str_t *value; |
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1364 ngx_int_t n; |
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1365 ngx_http_complex_value_t cv; |
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1366 ngx_http_compile_complex_value_t ccv; |
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1367 |
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1368 value = cf->args->elts; |
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1369 |
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1370 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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1371 |
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1372 ccv.cf = cf; |
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1373 ccv.value = &value[1]; |
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1374 ccv.complex_value = &cv; |
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1375 |
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1376 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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1377 return NGX_CONF_ERROR; |
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1378 } |
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1379 |
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1380 if (cv.lengths == NULL) { |
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1381 n = ngx_http_image_filter_value(&value[1]); |
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1382 |
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1383 if (n <= 0) { |
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1384 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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1385 "invalid parameter \"%V\"", &value[1]); |
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1386 return NGX_CONF_ERROR; |
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1387 } |
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1388 |
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1389 imcf->jpeg_quality = (ngx_uint_t) n; |
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1390 |
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1391 } else { |
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1392 imcf->jqcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
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1393 if (imcf->jqcv == NULL) { |
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1394 return NGX_CONF_ERROR; |
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1395 } |
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|
1396 |
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1397 *imcf->jqcv = cv; |
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1398 } |
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|
1399 |
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1400 return NGX_CONF_OK; |
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1401 } |
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1402 |
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1403 |
| 2788 | 1404 static ngx_int_t |
| 1405 ngx_http_image_filter_init(ngx_conf_t *cf) | |
| 1406 { | |
| 1407 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 1408 ngx_http_top_header_filter = ngx_http_image_header_filter; | |
| 1409 | |
| 1410 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 1411 ngx_http_top_body_filter = ngx_http_image_body_filter; | |
| 1412 | |
| 1413 return NGX_OK; | |
| 1414 } |