JSP Tutorials - Herong's Tutorial Examples - Version 4.03, by Dr. Herong Yang
Response Header Lines of Static Files
This section provides tutorial examples of response header lines of static files like hello.html, dot.gif, and hello.pdf. Content-Type header line is set based on file name extension.
Static files can be served directly by Tomcat server, if you copy the files to \local\apache-tomcat-7.0.32\webapps\ROOT. Tomcat server will set "Content_Type" header line based on the file name extension and the MIME settings of the server configuration.
Let's use my test program, HttpRequestGet.java, provided in the previous section to look at response header lines returned by Tomcat 7 server for 3 commonly used file name extensions.
1. Response header lines when requesting .html files:
C:\>java HttpRequestGet /hello.html 8080 HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Accept-Ranges: bytes ETag: W/"38-1047470754000" Last-Modified: 12:05:54 GMT Content-Type: text/html Content-Length: 38 Date: 01:43:40 GMT Connection: close <html><body>Hello world!</body></html>
Couple of interesting notes here:
2. Response header lines when requesting .gif files:
C:\>java HttpRequestGet /dot.gif 8080 HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Accept-Ranges: bytes ETag: W/"43-1292039810000" Last-Modified: 03:56:50 GMT Content-Type: image/gif Content-Length: 43 Date: 01:48:41 GMT Connection: close GIF89a......
As you can see, Content_Type was set correctly to "image/gif" for file name extension "gif", as defined in the MIME settings. I could not included the entire entity body here because it contains binary data.
3. Response header lines when requesting .pdf files:
C:\>java HttpRequestGet /hello.pdf 8080 HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Accept-Ranges: bytes ETag: W/"909-1059333732000" Last-Modified: 19:22:12 GMT Content-Type: application/pdf Content-Length: 909 Date: 01:51:02 GMT Connection: close %PDF-1.3 % ... 4 0 obj ......
Again, Content_Type was set correctly to "application/pdf" for file name extension "pdf", as defined in the MIME settings. I truncated the entity body to save some space.
Last update: 2012.
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