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34 package info.magnolia.imaging;
35
36 import info.magnolia.imaging.util.PathSplitter;
37 import info.magnolia.objectfactory.Components;
38
39 import java.io.IOException;
40 import java.io.OutputStream;
41
42 import javax.inject.Inject;
43 import javax.inject.Provider;
44 import javax.servlet.ServletException;
45 import javax.servlet.http.HttpServlet;
46 import javax.servlet.http.HttpServletRequest;
47 import javax.servlet.http.HttpServletResponse;
48
49 import org.slf4j.Logger;
50 import org.slf4j.LoggerFactory;
51
52 import com.google.common.net.MediaType;
53
54
55
56
57 public class ImagingServlet extends HttpServlet {
58 private static final Logger log = LoggerFactory.getLogger(ImagingServlet.class);
59 private final Imaging imaging;
60 private final Provider<ImagingModule> imagingModuleProvider;
61
62 @Inject
63 public ImagingServlet(Imaging imaging, Provider<ImagingModule> imagingModuleProvider) {
64 this.imaging = imaging;
65 this.imagingModuleProvider = imagingModuleProvider;
66 }
67
68
69
70
71 @Deprecated
72 public ImagingServlet(final ImagingModule imagingModule) {
73 this.imaging = Components.getComponent(Imaging.class);
74 this.imagingModuleProvider = new Provider<ImagingModule>() {
75 @Override
76 public ImagingModule get() {
77 return Components.getComponent(ImagingModule.class);
78 }
79 };
80 }
81
82 @Override
83 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
84 final String generatorName = getImageGeneratorName(request);
85
86 try {
87 imaging.generate(generatorName, request, new ServletImageResponse(response));
88 response.flushBuffer();
89 } catch (IOException e) {
90
91
92 log.debug("Unable to spool resource due to a {} exception", e.getClass().getName());
93 if (!response.isCommitted()) {
94 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
95 }
96 } catch (ImagingException e) {
97 throw new ServletException(e);
98 }
99 }
100
101
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103
104
105 protected String getImageGeneratorName(HttpServletRequest request) {
106 final String pathInfo = request.getPathInfo();
107 return new PathSplitter(pathInfo).skipTo(0);
108 }
109
110 protected ImageGenerator getGenerator(String generatorName) {
111 final ImagingModule module = getImagingModule();
112 return module.getGenerators().get(generatorName);
113 }
114
115 protected ImagingModule getImagingModule() {
116 return imagingModuleProvider.get();
117 }
118
119 private static class ServletImageResponse implements ImageResponse {
120 private final HttpServletResponse response;
121
122 public ServletImageResponse(HttpServletResponse response) {
123 this.response = response;
124 }
125
126 @Override
127 public void setMediaType(MediaType mediaType) throws IOException {
128 response.setContentType(mediaType.toString());
129 }
130
131 @Override
132 public OutputStream getOutputStream() throws IOException {
133 return response.getOutputStream();
134 }
135 }
136 }