On Tue, Mar 26, 2013 at 3:56 PM, Christopher Schultz < ch...@christopherschultz.net> wrote:
> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Thad, > > Coming a little late to the party... > > On 3/24/13 4:30 PM, Thad Humphries wrote: > > I have a web-app that uses a servlet for downloading files from a > > repository--PDF, Office, images, zip, etc. It works with desktop > > browsers--IE, Firefox, Chrome, and Safari--on their various > > platforms. It also works fine with Firefox from Android (2.3 and > > 4.x tested). However when I try with Android's default WebKit > > browser, the servlet fails immediately with > > org.apache.catalina.connector.ClientAbortException (so says the > > stderr log). > > This smells like it might be a Range request issue. Is the client > sending a Range header along with the request? Are you respecting it? > I don't see a Range header from my servlet. Here's the request; GET /myapp/webclient/copyObjectServlet?tag=0oATVXQD1B_l4Vzpw9n1X1EeKIXTKk6d&name=grilled_romaine.doc HTTP/1.1 Host: 10.1.2.1:8080 Accept-Encoding: gzip Accept-Language: en-US x-wap-profile: http://www.htcmms.com.tw/Android/Common/Ace/A9192-1.0.xml Cookie: JSESSIONID=0AACB4E188B2B68605FE0189C007F7BB Accept-Charset: utf-8, iso-8859-1, utf-16, *;q=0.7 Referer: http://10.1.2.1:8080/myapp/?id=ipad&ref=267 Keep-Alive: 115 User-Agent: Mozilla/5.0 (Linux; U; Android 2.3.5; en-us; HTC-A9192/1.0 Build/GRJ90) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 x-att-deviceid: HTC-A9192/1.0 Connection: keep-alive Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5 Here's the response: HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Expires: 0 Cache-Control: private Pragma: cache Content-Disposition: attachment; filename="grilled_romaine.doc" Content-Type: application/msword Content-Length: 12288 Date: Wed, 27 Mar 2013 20:46:02 GMT > I wouldn't be surprised if what's happening is that you are getting a > Range request (maybe for the first few hundred bytes) and you are > ignoring it, returning the entire file. Once the client gets enough > bytes, it simply closes the connection and the rest of the bytes in > transit fall on the floor. > > If the next request is for the last few hundred bytes (frequently, > this will happen with ZIP and PDF files, since there is critical > information at the /end/ of the file) and you return the whole file, > the client may give up at any point (which IMO is silly) in the same way. > > > I suspect this is a problem with mobile WebKit, and that > > circumventing the abort might be a "bad thing" even if it's > > possible. However I thought I'd inquire here if there is a Tomcat > > way around it. If not, it seems my alternatives are (1) use Java > > Mail to mail the user the file, since mail apps open their > > attachments; and (2) write iOS and Android apps file query and > > downloading. Neither prospect thrills me. > > If the problem truly is Range-related, you may be able to alter your > servlet to respect the Range request. Of primary benefit will be that > you will (probably) be sending fewer bytes over the network, which can > significantly improve performance. Obviously, the secondary benefit > will be that you don't get these errors anymore. > > Of course, coping with Range requests is non-trivial. Be sure to read > the RFPs very closely. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG/MacGPG2 v2.0.17 (Darwin) > Comment: GPGTools - http://gpgtools.org > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iQIcBAEBCAAGBQJRUf1zAAoJEBzwKT+lPKRYrUIQAITTszTQujDkBaKWTVVDlbB6 > xm3m2K6hQls4T743dTY4hGOSWrTPB3ovBpkkfgm1kGxJQsSsRhrD5t8+BhHIIpE7 > Iax24MBD4XTrvPzEuYlx3DSqx2JZK/iDfkffMfmg6Fq74/j3LoStZdTnmts2nQ0l > BCi5jtU3TMTZdwkNpVMmEiwomY205QBXqAaIEcjs+BtOtvTQakL80XQS3F1FDaPz > 315pW2cx9JqwWyjmA+5dqPY9zEQVO1JBou7fwMROO1BJ9wo74UxUFDGGETko6ODm > 4TGd9QpU4Lwnbu9NrK7PxiEnbNGiUC8JGuADpr9lp/jrgg4PyMtFZIVRNUqX5Vkg > YDnwZFYlcyfmXVa4xHtYogL+qdPb3E0DM+RFfaFy9ka2Q7gwvGVLpHYNancTCicd > GkU7Hb4mUSZDyR7AAXfJoaLlHVODs2tue8zix8K8y02Rqb49Bc+YS1BB2WgqQSFC > 0PJ+Z3kWHbZfiTUcz5ZT7SoQsgPtSuagI9SNBBBeFqn2zOdkNkJcgcQ4OKoqDt71 > g3ocpV2PaBtV0cDoL30DiNwy9byrsUKmjlF2b3oyHh4BfxO9UzKPGfd8kgMDg/X0 > Tq7SbPSBwkoOHUVyNCfzMicS4zz/octolUxCS+k+7kC4rqfz98Ke2t7003OLbRqc > UOO6QgF6KV62ETx5zBve > =mn1G > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- "Hell hath no limits, nor is circumscrib'd In one self-place; but where we are is hell, And where hell is, there must we ever be" --Christopher Marlowe, *Doctor Faustus* (v, 121-24
