Content-Disposition for CiteSeerX

CiteSeerRepro.py

import SimpleHTTPServer
import SocketServer
import BaseHTTPServer

import re
import os
import os.path
import shutil

__doc__ = """

<pre>
This server reproduces a small problem with how pdfs are displayed and downloaded
from <a href="http://citeseerx.ist.psu.edu/index">citeseer</a>. When a user saves a document the filename is nearly always "download.pdf".

Setting the http header,

    Content-Disposition:   inline; filename="10.1.1.16.2427.pdf"

Allows for the content to be displayed inline and saved with the correct filename.

For example

    http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.16.2427

links to a pdf

    http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.16.2427&rep=rep1&type=pdf

    with the server supplying the current headers on download

          HTTP/1.1 200 OK
          Server: Apache-Coyote/1.1
          Content-Type: application/pdf
          Content-Length: 213454
          Date: Thu, 20 Mar 2014 18:21:58 GMT


which displays inline with current dev browsers as of 20 March 2014

    Google Chrome 35.0.1897.3 dev
    Firefox Aurora 29.0a2
    Safari 7.0.2

When the user saves the document from the inline display, all of the above browsers fill
the file dialog with filename of "download.pdf" which forces the user to manually rename
the file or have many download.pdf, download (1).pdf files on their machine. It would
be nice if the file was saved with its DOI.

This server reproduces the bug and supplies a fix.

1) Download a pdf from citeseer into the same directory as CiteSeerDownloadRepro.py

wget -O 10.1.1.16.2427.pdf 'http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.16.2427&rep=rep1&type=pdf'

2) Launch server

python CiteSeerDownloadRepro.py

3) Repro existing download behavior

<a href="http://localhost:4000/viewdoc/download?doi=10.1.1.16.2427&rep=rep1&type=pdf">http://localhost:4000/viewdoc/download?doi=10.1.1.16.2427&rep=rep1&type=pdf</a>

The document views inline, but saves as download.pdf

4) Add the content disposition header by appending FIXBUG do the url

<a href="http://localhost:4000/viewdoc/download?doi=10.1.1.16.2427&rep=rep1&type=pdf&FIXBUG">http://localhost:4000/viewdoc/download?doi=10.1.1.16.2427&rep=rep1&type=pdf&FIXBUG</a>

The document views inline, but saves as 10.1.1.16.2427.pdf

    with the repro server supplying the following headers

          HTTP/1.0 200 OK
          Server: CiteSeerBugRepro/0.1.1 Python/2.7.6
          Date: Thu, 20 Mar 2014 18:26:54 GMT
          Content-Type: application/pdf
          Content-Length: 213454
          Content-Disposition: inline; filename="10.1.1.16.2427.pdf"

And the world rejoices.

</pre>
"""

PORT = 4000

__version__ = "0.1.1"

class ReuseTCPServer(SocketServer.TCPServer):
    allow_reuse_address = True


class CiteSeerHandler(BaseHTTPServer.BaseHTTPRequestHandler):
    server_version = "CiteSeerBugRepro/" + __version__
    def send_header(self, keyword, value):
        print keyword, value
        BaseHTTPServer.BaseHTTPRequestHandler.send_header(self,keyword,value)


    def do_GET(self):
        print self.path
        match_doi = re.search("doi=(\d+)\.(\d+)\.(\d+)\.(\d+)\.(\d+)",self.path)
        if match_doi:
            doi = '.'.join(match_doi.groups())
            print doi
            pdf_path = doi + ".pdf"
            if os.path.exists(pdf_path):
                self.send_response(200)
                self.send_header("Content-Type","application/pdf")
                f = open(pdf_path,'rb')
                fs = os.fstat(f.fileno())
                self.send_header("Content-Length", str(fs[6]))
                if 'FIXBUG' in self.path:
                    self.send_header("Content-Disposition",r'''inline; filename="%s"''' % (pdf_path,))
                self.end_headers()
                shutil.copyfileobj(f,self.wfile)

            else:
                self.send_response(404)
                self.end_headers()
                self.wfile.write("No pdf file found!")

        else:
            self.send_response(200)
            self.send_header("Content-Type","text/html")
            self.end_headers()
            self.wfile.write(__doc__)


httpd = ReuseTCPServer(("", PORT), CiteSeerHandler)

print "open this url and follow the instructions", PORT
print "http://localhost:" + str(PORT)
httpd.serve_forever()

This issue has been fixed from an earlier mail I sent, SeerLabs/CiteSeerX@3555ff3