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