Crash on Tapatalk launch
kvic-z opened this issue · 2 comments
kvic-z commented
Client
Tapatalk Android client.
Symptom
On launch, Tapatalk sends a big chunk ~16KB of data using POST. Captured request looks like below. pixelserv-tls v2.0.1-rc2 crashes.
POST /v2.9/469687153111700/activities?access_token=&format=json&sdk=android HTTP/1.1
User-Agent: FBAndroidSDK.4.23.0
Accept-Language: es_ES
Content-Type: multipart/form-data; boundary=3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f
Transfer-Encoding: chunked
Host: graph.facebook.com
Connection: Keep-Alive
Accept-Encoding: gzip
7056
--3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f
Content-Disposition: form-data; name="format"
json
--3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f
Content-Disposition: form-data; name="sdk"
android
--3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f
Content-Disposition: form-data; name="custom_events_file"; filename="custom_events_file"
Content-Type: content/unknown
[{"_eventName":"Start_Session","_logTime":1512749547,"_ui":"null","_session_id":"5d35bdf4-4862-492e-b8fc-f80c574721c2","Channel":"Push_Conv"},{"_eventName":"fb_mobile_activate_app","_logTime":1512749256,"_ui":"CreateMessageActivity","_session_id":"5d35bdf4-4862-492e-b8fc-f80c574721c2","fb_mobile_launch_source":"Unclassified"},
kvic-z commented
Analysis
Tapatalk uses multi-part POST to upload contents to pixelserv-tls (i.e. ad servers) with Transport-Encoding: chunked. pixelserv-tls cannot parse this mechanism and hence crashes.