1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: MapCache tile caching support file: WMS datasources
* Author: Thomas Bonfort and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2011 Regents of the University of Minnesota.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include "mapcache.h"
#include "ezxml.h"
#include <apr_tables.h>
#include <apr_strings.h>
/**
* \private \memberof mapcache_source_wms
* \sa mapcache_source::render_map()
*/
void _mapcache_source_wms_render_map(mapcache_context *ctx, mapcache_map *map)
{
mapcache_source_wms *wms = (mapcache_source_wms*)map->tileset->source;
mapcache_http *http;
apr_table_t *params = apr_table_clone(ctx->pool,wms->wms_default_params);
apr_table_setn(params,"BBOX",apr_psprintf(ctx->pool,"%f,%f,%f,%f",
map->extent.minx,map->extent.miny,map->extent.maxx,map->extent.maxy));
apr_table_setn(params,"WIDTH",apr_psprintf(ctx->pool,"%d",map->width));
apr_table_setn(params,"HEIGHT",apr_psprintf(ctx->pool,"%d",map->height));
apr_table_setn(params,"FORMAT","image/png");
apr_table_setn(params,"SRS",map->grid_link->grid->srs);
apr_table_overlap(params,wms->getmap_params,APR_OVERLAP_TABLES_SET);
if(map->dimensions && !apr_is_empty_table(map->dimensions)) {
const apr_array_header_t *elts = apr_table_elts(map->dimensions);
int i;
for(i=0; i<elts->nelts; i++) {
apr_table_entry_t entry = APR_ARRAY_IDX(elts,i,apr_table_entry_t);
/* set both DIM_key=val and key=val KVP params */
apr_table_setn(params,entry.key,entry.val);
if(strcasecmp(entry.key,"TIME") && strcasecmp(entry.key,"ELEVATION")) {
char *dim_name = apr_pstrcat(ctx->pool,"DIM_",entry.key,NULL);
apr_table_setn(params,dim_name,entry.val);
}
}
}
/* if the source has no LAYERS parameter defined, then use the tileset name
* as the LAYERS to request. When using mirror-mode, the source has no layers
* defined, it is added based on the incoming request
*/
if(!apr_table_get(params,"layers")) {
apr_table_set(params,"LAYERS",map->tileset->name);
}
map->encoded_data = mapcache_buffer_create(30000,ctx->pool);
http = mapcache_http_clone(ctx, wms->http);
http->url = mapcache_http_build_url(ctx,http->url,params);
mapcache_http_do_request(ctx,http,map->encoded_data,NULL,NULL);
GC_CHECK_ERROR(ctx);
if(!mapcache_imageio_is_valid_format(ctx,map->encoded_data)) {
char *returned_data = apr_pstrndup(ctx->pool,(char*)map->encoded_data->buf,map->encoded_data->size);
ctx->set_error(ctx, 502, "wms request for tileset %s returned an unsupported format:\n%s",
map->tileset->name, returned_data);
}
}
void _mapcache_source_wms_query(mapcache_context *ctx, mapcache_feature_info *fi)
{
mapcache_map *map = (mapcache_map*)fi;
mapcache_http *http;
mapcache_source_wms *wms = (mapcache_source_wms*)map->tileset->source;
apr_table_t *params = apr_table_clone(ctx->pool,wms->wms_default_params);
apr_table_overlap(params,wms->getmap_params,0);
apr_table_setn(params,"BBOX",apr_psprintf(ctx->pool,"%f,%f,%f,%f",
map->extent.minx,map->extent.miny,map->extent.maxx,map->extent.maxy));
apr_table_setn(params,"REQUEST","GetFeatureInfo");
apr_table_setn(params,"WIDTH",apr_psprintf(ctx->pool,"%d",map->width));
apr_table_setn(params,"HEIGHT",apr_psprintf(ctx->pool,"%d",map->height));
apr_table_setn(params,"SRS",map->grid_link->grid->srs);
apr_table_setn(params,"X",apr_psprintf(ctx->pool,"%d",fi->i));
apr_table_setn(params,"Y",apr_psprintf(ctx->pool,"%d",fi->j));
apr_table_setn(params,"INFO_FORMAT",fi->format);
apr_table_overlap(params,wms->getfeatureinfo_params,0);
if(map->dimensions && !apr_is_empty_table(map->dimensions)) {
const apr_array_header_t *elts = apr_table_elts(map->dimensions);
int i;
for(i=0; i<elts->nelts; i++) {
apr_table_entry_t entry = APR_ARRAY_IDX(elts,i,apr_table_entry_t);
apr_table_setn(params,entry.key,entry.val);
}
}
fi->data = mapcache_buffer_create(30000,ctx->pool);
http = mapcache_http_clone(ctx, wms->http);
http->url = mapcache_http_build_url(ctx,http->url,params);
mapcache_http_do_request(ctx,http,fi->data,NULL,NULL);
GC_CHECK_ERROR(ctx);
}
/**
* \private \memberof mapcache_source_wms
* \sa mapcache_source::configuration_parse()
*/
void _mapcache_source_wms_configuration_parse_xml(mapcache_context *ctx, ezxml_t node, mapcache_source *source)
{
ezxml_t cur_node;
mapcache_source_wms *src = (mapcache_source_wms*)source;
if ((cur_node = ezxml_child(node,"getmap")) != NULL) {
ezxml_t gm_node;
if ((gm_node = ezxml_child(cur_node,"params")) != NULL) {
for(gm_node = gm_node->child; gm_node; gm_node = gm_node->sibling) {
apr_table_set(src->getmap_params, gm_node->name, gm_node->txt);
}
} else {
ctx->set_error(ctx,400,"wms source %s <getmap> has no <params> block (should contain at least <LAYERS> child)",source->name);
return;
}
} else {
ctx->set_error(ctx,400,"wms source %s has no <getmap> block",source->name);
return;
}
if ((cur_node = ezxml_child(node,"getfeatureinfo")) != NULL) {
ezxml_t fi_node;
if ((fi_node = ezxml_child(cur_node,"info_formats")) != NULL) {
char *key,*last;
char *iformats;
source->info_formats = apr_array_make(ctx->pool,3,sizeof(char*));
iformats = apr_pstrdup(ctx->pool,fi_node->txt);
for (key = apr_strtok(iformats, "," , &last); key != NULL;
key = apr_strtok(NULL, ",", &last)) {
APR_ARRAY_PUSH(source->info_formats,char*) = key;
}
} else {
ctx->set_error(ctx,400,"wms source %s <getfeatureinfo> has no <info_formats> tag",source->name);
return;
}
if ((fi_node = ezxml_child(cur_node,"params")) != NULL) {
for(fi_node = fi_node->child; fi_node; fi_node = fi_node->sibling) {
apr_table_set(src->getfeatureinfo_params, fi_node->name, fi_node->txt);
}
} else {
ctx->set_error(ctx,400,"wms source %s <getfeatureinfo> has no <params> block (should contain at least <QUERY_LAYERS> child)",source->name);
return;
}
}
if ((cur_node = ezxml_child(node,"http")) != NULL) {
src->http = mapcache_http_configuration_parse_xml(ctx,cur_node);
}
}
/**
* \private \memberof mapcache_source_wms
* \sa mapcache_source::configuration_check()
*/
void _mapcache_source_wms_configuration_check(mapcache_context *ctx, mapcache_cfg *cfg,
mapcache_source *source)
{
mapcache_source_wms *src = (mapcache_source_wms*)source;
/* check all required parameters are configured */
if(!src->http) {
ctx->set_error(ctx, 400, "wms source %s has no <http> request configured",source->name);
}
if(!apr_table_get(src->getmap_params,"LAYERS")) {
if(cfg->mode == MAPCACHE_MODE_NORMAL) {
ctx->set_error(ctx, 400, "wms source %s has no LAYERS", source->name);
}
}
if(source->info_formats) {
if(!apr_table_get(src->getfeatureinfo_params,"QUERY_LAYERS")) {
ctx->set_error(ctx, 400, "wms source %s has no QUERY_LAYERS", source->name);
}
}
}
mapcache_source* mapcache_source_wms_create(mapcache_context *ctx)
{
mapcache_source_wms *source = apr_pcalloc(ctx->pool, sizeof(mapcache_source_wms));
if(!source) {
ctx->set_error(ctx, 500, "failed to allocate wms source");
return NULL;
}
mapcache_source_init(ctx, &(source->source));
source->source.type = MAPCACHE_SOURCE_WMS;
source->source.render_map = _mapcache_source_wms_render_map;
source->source.configuration_check = _mapcache_source_wms_configuration_check;
source->source.configuration_parse_xml = _mapcache_source_wms_configuration_parse_xml;
source->source.query_info = _mapcache_source_wms_query;
source->wms_default_params = apr_table_make(ctx->pool,4);;
source->getmap_params = apr_table_make(ctx->pool,4);
source->getfeatureinfo_params = apr_table_make(ctx->pool,4);
apr_table_add(source->wms_default_params,"VERSION","1.1.1");
apr_table_add(source->wms_default_params,"REQUEST","GetMap");
apr_table_add(source->wms_default_params,"SERVICE","WMS");
apr_table_add(source->wms_default_params,"STYLES","");
return (mapcache_source*)source;
}
/* vim: ts=2 sts=2 et sw=2
*/
|
