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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 (IllegalArgumentException | ImagingRuntimeException | ImagingException e) {
90 log.warn("Because of incorrect arguments the image couldn't be found", e);
91 response.sendError(HttpServletResponse.SC_NOT_FOUND);
92 } catch (IOException e) {
93
94
95 log.debug("Unable to spool resource due to a {} exception", e.getClass().getName());
96 if (!response.isCommitted()) {
97 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
98 }
99 }
100 }
101
102
103
104
105
106 protected String getImageGeneratorName(HttpServletRequest request) {
107 final String pathInfo = request.getPathInfo();
108 return new PathSplitter(pathInfo).skipTo(0);
109 }
110
111 protected ImageGenerator getGenerator(String generatorName) {
112 final ImagingModule module = getImagingModule();
113 return module.getGenerators().get(generatorName);
114 }
115
116 protected ImagingModule getImagingModule() {
117 return imagingModuleProvider.get();
118 }
119
120 private static class ServletImageResponse implements ImageResponse {
121 private final HttpServletResponse response;
122
123 public ServletImageResponse(HttpServletResponse response) {
124 this.response = response;
125 }
126
127 @Override
128 public void setMediaType(MediaType mediaType) throws IOException {
129 response.setContentType(mediaType.toString());
130 }
131
132 @Override
133 public OutputStream getOutputStream() throws IOException {
134 return response.getOutputStream();
135 }
136 }
137 }