Mercurial > hg > nginx
annotate src/http/modules/ngx_http_image_filter_module.c @ 4034:e2c075e774b6
Cache size accounting fix: actual cache size on disk was less than
needed by sum of sizes of files loaded by worker processes themselves
while cache loader was running.
The bug has been introduced in r3900.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Thu, 25 Aug 2011 17:29:34 +0000 |
| parents | 750fb808aa15 |
| 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 } |