I want to reduce the size of the cache memory that GeoWebCache makes. The cache is in PNG8 format, but the request from the client is in PNG format (FORMAT=image%2Fpng) and I can't change it. How do I configure GeoWebCache to save PNG8 with the .png extension? I can rename all files (tile.png8 -> tile.png), but perhaps there is a correct solution to my problem?
request
http://192.168.0.163:8080/geoserver/gwc/service/wms?STYLES=&VERSION=1.3.0&SRS=EPSG%3A3857&TRANSPARENT=TRUE&LAYERS=cite%3AALLGroup&EXCEPTIONS=INIMAGE&SERVICE=WMS&REQUEST=GetMap&FORMAT=image%2Fpng&CRS=EPSG%3A900913&BBOX=5290665.3462613,7817367.7529044,5293111.3311661,7819813.7378091&WIDTH=256&HEIGHT=256
I want to store the cache in png format like google map.
Driver: PNG/Portable Network Graphics
Files: 3.png
Size is 128, 128
Corner Coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0, 128.0)
Upper Right ( 128.0, 0.0)
Lower Right ( 128.0, 128.0)
Center ( 64.0, 64.0)
Band 1 Block=128x1 Type=Byte, ColorInterp=Palette
Color Table (RGB with 256 entries)
0: 84,88,72,255
1: 76,88,72,255
2: 80,88,72,255
3: 72,84,68,255
4: 76,84,68,255
5: 84,92,76,255
6: 88,96,80,255
7: 68,80,64,255
8: 155,159,139,255
9: 80,92,76,255
10: 88,92,76,255
11: 84,96,80,255
12: 92,100,84,255
13: 88,96,76,255
14: 116,120,100,255
15: 92,104,88,255
16: 100,112,96,255
17: 100,104,84,255
18: 64,76,60,255
19: 96,104,88,255
20: 167,171,151,255
21: 187,187,175,255
22: 68,84,68,255
23: 72,80,64,255
24: 84,92,72,255
25: 68,84,64,255
26: 104,108,88,255
27: 100,108,92,255
28: 147,151,131,255
29: 92,96,80,255
30: 88,88,72,255
31: 171,175,155,255
32: 80,84,68,255
33: 199,195,179,255
34: 72,88,68,255
35: 92,100,80,255
36: 76,92,72,255
37: 108,116,100,255
38: 104,112,96,255
39: 96,100,80,255
40: 179,179,167,255
41: 112,116,96,255
42: 163,167,147,255
43: 112,120,104,255
44: 108,112,92,255
45: 96,108,92,255
46: 76,88,68,255
47: 143,147,135,255
48: 80,88,68,255
49: 92,92,76,255
50: 96,104,84,255
51: 116,124,108,255
52: 72,88,72,255
53: 88,100,84,255
54: 108,120,104,255
55: 96,108,88,255
56: 120,120,100,255
57: 104,104,88,255
58: 120,124,104,255
59: 76,80,64,255
60: 64,80,64,255
61: 100,104,88,255
62: 207,207,187,255
63: 100,112,92,255
64: 131,131,112,255
65: 135,135,116,255
66: 147,151,135,255
67: 131,135,116,255
68: 96,100,84,255
69: 80,92,72,255
70: 143,143,131,255
71: 112,116,100,255
72: 88,92,72,255
73: 120,131,116,255
74: 131,135,112,255
75: 139,139,120,255
76: 56,72,52,255
77: 179,179,159,255
78: 68,76,60,255
79: 96,96,80,255
80: 116,120,104,255
81: 96,108,96,255
82: 76,92,76,255
83: 104,112,92,255
84: 104,116,100,255
85: 108,108,92,255
86: 124,131,116,255
87: 48,64,56,255
88: 128,131,112,255
89: 100,108,88,255
90: 100,100,84,255
91: 112,124,108,255
92: 92,96,76,255
93: 76,84,64,255
94: 72,84,64,255
95: 88,100,80,255
96: 116,116,100,255
97: 84,96,76,255
98: 64,84,64,255
99: 124,124,108,255
100: 84,88,68,255
101: 60,72,56,255
102: 108,116,96,255
103: 120,120,104,255
104: 108,112,96,255
105: 112,112,92,255
106: 116,116,96,255
107: 108,108,88,255
108: 147,147,124,255
109: 72,84,72,255
110: 116,128,112,255
111: 84,84,68,255
112: 84,100,84,255
113: 88,92,80,255
114: 124,135,120,255
115: 112,112,96,255
116: 60,76,56,255
117: 76,88,76,255
118: 135,139,116,255
119: 104,104,84,255
120: 128,128,108,255
121: 120,128,112,255
122: 72,76,60,255
123: 159,163,147,255
124: 124,128,108,255
125: 139,147,131,255
126: 64,80,60,255
127: 147,155,139,255
128: 139,143,124,255
129: 139,143,120,255
130: 128,131,116,255
131: 88,100,88,255
132: 135,143,128,255
133: 128,131,108,255
134: 80,96,80,255
135: 116,124,104,255
136: 104,108,92,255
137: 92,104,84,255
138: 131,131,116,255
139: 128,139,124,255
140: 100,100,80,255
141: 68,80,68,255
142: 76,84,72,255
143: 151,155,135,255
144: 120,124,108,255
145: 84,100,80,255
146: 76,80,68,255
147: 143,147,131,255
148: 108,112,100,255
149: 131,139,120,255
150: 151,151,135,255
151: 143,143,124,255
152: 68,88,68,255
153: 120,124,100,255
154: 135,139,120,255
155: 60,80,60,255
156: 124,124,112,255
157: 120,128,108,255
158: 151,155,139,255
159: 215,215,195,255
160: 124,131,112,255
161: 135,139,124,255
162: 80,84,64,255
163: 72,92,72,255
164: 112,124,104,255
165: 80,96,76,255
166: 80,92,80,255
167: 155,163,147,255
168: 155,155,135,255
169: 80,84,72,255
170: 84,88,76,255
171: 135,139,128,255
172: 159,163,143,255
173: 68,80,60,255
174: 112,120,100,255
175: 151,151,139,255
176: 92,96,84,255
177: 131,135,124,255
178: 131,135,120,255
179: 64,76,64,255
180: 124,135,116,255
181: 143,143,120,255
182: 96,100,88,255
183: 116,120,96,255
184: 124,128,104,255
185: 96,96,76,255
186: 104,116,96,255
187: 120,120,108,255
188: 68,72,56,255
189: 223,219,207,255
190: 40,56,40,255
191: 143,147,128,255
192: 108,120,100,255
193: 163,163,139,255
194: 64,72,56,255
195: 92,104,80,255
196: 108,112,88,255
197: 135,135,120,255
198: 84,84,72,255
199: 139,139,124,255
200: 92,100,76,255
201: 139,143,131,255
202: 92,92,72,255
203: 143,147,124,255
204: 72,76,64,255
205: 159,159,151,255
206: 124,128,112,255
207: 96,104,80,255
208: 112,116,92,255
209: 80,80,64,255
210: 139,139,131,255
211: 124,131,108,255
212: 116,128,108,255
213: 120,124,112,255
214: 72,80,68,255
215: 88,100,76,255
216: 131,131,108,255
217: 76,96,76,255
218: 84,92,80,255
219: 100,104,80,255
220: 108,120,112,255
221: 80,88,76,255
222: 239,239,223,255
223: 227,231,211,255
224: 135,135,124,255
225: 84,92,68,255
226: 135,143,131,255
227: 28,52,40,255
228: 100,108,84,255
229: 128,124,104,255
230: 155,155,131,255
231: 139,147,124,255
232: 131,131,124,255
233: 48,76,68,255
234: 84,96,72,255
235: 112,120,96,255
236: 68,76,64,255
237: 128,135,116,255
238: 80,92,68,255
239: 80,80,60,255
240: 72,80,60,255
241: 100,116,100,255
242: 28,60,52,255
243: 76,88,64,255
244: 72,92,76,255
245: 131,139,116,255
246: 88,92,68,255
247: 20,40,32,255
248: 84,88,64,255
249: 139,143,128,255
250: 92,96,72,255
251: 128,135,120,255
252: 80,88,64,255
253: 12,44,36,255
254: 24,52,44,255
255: 16,48,44,255
image/pngandimage/png8are different formats and the client should respect that. I'd file a bug against the client