On Tue, Sep 08, 2009 at 08:55:34PM -0700, caymanag wrote:
>
> I am trying to figure out how to use HttpClient to read a file that is
> presented as an attachment on a web page. Below are the slightly simplified
> request and response headers. See in the response headers that the file is
> specified as Content-Disposition attachment, filename="myfile.csv". A web
> browser will correctly download this file. I don't know how to read this
> file from HttpClient code. I'm guessing that perhaps I am not paying
> attention to the chunked encoding that is causing me to read 0.
>
> Request Header
> (Request-Line) GET /dir1/dir2/dir3?par1=val1&par2=val2&par3=val3
> HTTP/1.1
> Host webhost.server.com
> User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US;
> rv:1.9.0.13) Gecko/2009073021 Firefox/3.0.13
> Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
> Accept-Language en-us,en;q=0.5
> Accept-Encoding gzip,deflate
> Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7
> Keep-Alive 300
> Connection keep-alive
> Cookie cookie1=cookievalue
>
> Response Header
> (Status-Line) HTTP/1.1 200 OK
> Set-Cookie cookie2=value2
> Content-Disposition attachment; filename="myfile.csv"
> Content-Type text/csv; charset=UTF-8
> Content-Encoding gzip
> Transfer-Encoding chunked
> Date Wed, 09 Sep 2009 02:31:38 GMT
> Expires Wed, 09 Sep 2009 02:31:38 GMT
> Cache-Control private, max-age=0
> X-Content-Type-Options nosniff
> Server servername
>
> Here are the debug messages:
>
> 2009/09/08 23:02:48:363 EDT [DEBUG] header - >> "GET
> /dir1/dir2/dir3?par1=val1&par2=val2&par3=val3 HTTP/1.1 HTTP/1.1[\r][\n]"
> 2009/09/08 23:02:48:364 EDT [DEBUG] HttpMethodBase - Adding Host request
> header
> 2009/09/08 23:02:48:366 EDT [DEBUG] header - >> "User-Agent: Jakarta
> Commons-HttpClient/3.1[\r][\n]"
> 2009/09/08 23:02:48:366 EDT [DEBUG] header - >>
> "Host:webhost.server.com[\r][\n]"
> 2009/09/08 23:02:48:367 EDT [DEBUG] header - >> "Cookie:
> cookie1=cookieval[\r][\n]"
> 2009/09/08 23:02:48:370 EDT [DEBUG] header - >> "[\r][\n]"
> 2009/09/08 23:02:48:439 EDT [DEBUG] header - << "HTTP/1.1 200 OK[\r][\n]"
> 2009/09/08 23:02:48:440 EDT [DEBUG] header - << "HTTP/1.1 200 OK[\r][\n]"
> 2009/09/08 23:02:48:441 EDT [DEBUG] header - << "Set-Cookie:
> cookie2=value2[\r][\n]"
> 2009/09/08 23:02:48:442 EDT [DEBUG] header - << "Content-disposition:
> attachment; filename="myfile.csv"[\r][\n]"
> 2009/09/08 23:02:48:443 EDT [DEBUG] header - << "Content-Type: text/csv;
> charset=UTF-8[\r][\n]"
> 2009/09/08 23:02:48:444 EDT [DEBUG] header - << "Transfer-Encoding:
> chunked[\r][\n]"
> 2009/09/08 23:02:48:444 EDT [DEBUG] header - << "Date: Wed, 09 Sep 2009
> 03:02:48 GMT[\r][\n]"
> 2009/09/08 23:02:48:445 EDT [DEBUG] header - << "Expires: Wed, 09 Sep 2009
> 03:02:48 GMT[\r][\n]"
> 2009/09/08 23:02:48:446 EDT [DEBUG] header - << "Cache-Control: private,
> max-age=0[\r][\n]"
> 2009/09/08 23:02:48:447 EDT [DEBUG] header - << "X-Content-Type-Options:
> nosniff[\r][\n]"
> 2009/09/08 23:02:48:448 EDT [DEBUG] header - << "Server: servername[\r][\n]"
> 2009/09/08 23:02:48:448 EDT [DEBUG] header - << "[\r][\n]"
> 2009/09/08 23:02:48:450 EDT [DEBUG] HttpMethodBase - Cookie accepted:
> "cookie2=value2"
> 2009/09/08 23:02:48:451 EDT [DEBUG] HttpConnection - Input data available
> 2009/09/08 23:03:51:935 EDT [DEBUG] header - << "[\r][\n]"
> 2009/09/08 23:03:51:936 EDT [DEBUG] HttpMethodBase - Resorting to protocol
> version default close connection policy
> 2009/09/08 23:03:51:936 EDT [DEBUG] HttpMethodBase - Should NOT close
> connection, using HTTP/1.1
> 2009/09/08 23:03:51:937 EDT [DEBUG] HttpConnection - Releasing connection
> back to connection manager.
>
I see no content sent by the server at all. Is this wire log complete?
Oleg
> // Add any query parameters
> if (queryStringNameValuePairs != null) {
> getMethod.setQueryString(queryStringNameValuePairs);
> }
>
> // Add any request headers
> if (requestHeaders != null) {
> for (int i = 0; i < requestHeaders.length; i++) {
> NameValuePair nvp = requestHeaders[i];
> getMethod.addRequestHeader(nvp.getName(),
> nvp.getValue());
> }
> }
>
> client.executeMethod(getMethod);
> int statuscode = getMethod.getStatusCode();
>
> if (statuscode == HttpStatus.SC_OK) {
> // Here is where I had hoped to read the file
> reader = new BufferedReader(new
> InputStreamReader(getMethod.getResponseBodyAsStream()));
> buf = new StringBuffer();
> for (String line = reader.readLine(); line != null;
> line =
> reader.readLine()) {
> buf.append(line + "\n");
> }
> getMethod.releaseConnection();
> System.out.println(buf.toString()); //nothing
> }
>
> Unfortunately, there is never any data to read. Thank you, Cayman.
>
> --
> View this message in context:
> http://www.nabble.com/Read-attached-file-from-webpage-tp25358160p25358160.html
> Sent from the HttpClient-User mailing list archive at Nabble.com.
>
>
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