webapi doesnt handle Range header correctly

[spreitzer]

The webapi hangs if a GET request with Range header is sent and the Range is equal the size or size-1 if cap is a unterminated string.

given that filecap contains 'hi':

130 sspreitz@sspreitz:~/workspace/tahoefuse/src$ curl -v -r 0-0 http://127.0.0.1:3456/uri/URI:SSK:rei5f5wqbqycmq2mwtjygglyii:ho4xwwvgbvhwp6xyleafclcjikszuvilb2yzyap4slwgsnmz6joa                                                             
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port 3456 (#0)
> GET /uri/URI:SSK:rei5f5wqbqycmq2mwtjygglyii:ho4xwwvgbvhwp6xyleafclcjikszuvilb2yzyap4slwgsnmz6joa HTTP/1.1
> Range: bytes=0-0
> User-Agent: curl/7.37.0
> Host: 127.0.0.1:3456
> Accept: */*
> 
< HTTP/1.1 206 Partial Content
< Content-Length: 1
< Accept-Ranges: bytes
* Server TwistedWeb/14.0.2 is not blacklisted
< Server: TwistedWeb/14.0.2
< Content-Range: bytes 0-0/2
< Date: Sat, 04 Jul 2015 15:02:39 GMT
< Content-Type: text/plain
< 
* Connection #0 to host 127.0.0.1 left intact
hsspreitz@sspreitz:~/workspace/tahoefuse/src$ curl -v -r 0-1 http://127.0.0.1:3456/uri/URI:SSK:rei5f5wqbqycmq2mwtjygglyii:ho4xwwvgbvhwp6xyleafclcjikszuvilb2yzyap4slwgsnmz6joa                                                                
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port 3456 (#0)
> GET /uri/URI:SSK:rei5f5wqbqycmq2mwtjygglyii:ho4xwwvgbvhwp6xyleafclcjikszuvilb2yzyap4slwgsnmz6joa HTTP/1.1
> Range: bytes=0-1
> User-Agent: curl/7.37.0
> Host: 127.0.0.1:3456
> Accept: */*
> 
< HTTP/1.1 206 Partial Content
< Content-Length: 2
< Accept-Ranges: bytes
* Server TwistedWeb/14.0.2 is not blacklisted
< Server: TwistedWeb/14.0.2
< Content-Range: bytes 0-1/2
< Date: Sat, 04 Jul 2015 15:02:50 GMT
< Content-Type: text/plain
< 
^C
130 sspreitz@sspreitz:~/workspace/tahoefuse/src$ curl -v -r 0-2 http://127.0.0.1:3456/uri/URI:SSK:rei5f5wqbqycmq2mwtjygglyii:ho4xwwvgbvhwp6xyleafclcjikszuvilb2yzyap4slwgsnmz6joa                                                             
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port 3456 (#0)
> GET /uri/URI:SSK:rei5f5wqbqycmq2mwtjygglyii:ho4xwwvgbvhwp6xyleafclcjikszuvilb2yzyap4slwgsnmz6joa HTTP/1.1
> Range: bytes=0-2
> User-Agent: curl/7.37.0
> Host: 127.0.0.1:3456
> Accept: */*
> 
< HTTP/1.1 206 Partial Content
< Content-Length: 2
< Accept-Ranges: bytes
* Server TwistedWeb/14.0.2 is not blacklisted
< Server: TwistedWeb/14.0.2
< Content-Range: bytes 0-1/2
< Date: Sat, 04 Jul 2015 15:02:56 GMT
< Content-Type: text/plain
< 
^C

Apache httpd returns:

sspreitz@sspreitz:~/workspace/tahoefuse/src$ curl -v -r 0-0 http://people.redhat.com/sspreitz/hi                                                                                                                                            
* Hostname was NOT found in DNS cache
*   Trying 10.5.19.28...
* Connected to people.redhat.com (10.5.19.28) port 80 (#0)
> GET /sspreitz/hi HTTP/1.1
> Range: bytes=0-0
> User-Agent: curl/7.37.0
> Host: people.redhat.com
> Accept: */*
> 
< HTTP/1.1 206 Partial Content
< Date: Sat, 04 Jul 2015 15:06:32 GMT
* Server Apache is not blacklisted
< Server: Apache
< Last-Modified: Sat, 04 Jul 2015 15:06:06 GMT
< ETag: "2-51a0e030688e9"
< Accept-Ranges: bytes
< Content-Length: 1
< Content-Range: bytes 0-0/2
< Connection: close
< 
* Closing connection 0
hsspreitz@sspreitz:~/workspace/tahoefuse/src$ curl -v -r 0-1 http://people.redhat.com/sspreitz/hi                                                                                                                                             
* Hostname was NOT found in DNS cache
*   Trying 10.5.19.28...
* Connected to people.redhat.com (10.5.19.28) port 80 (#0)
> GET /sspreitz/hi HTTP/1.1
> Range: bytes=0-1
> User-Agent: curl/7.37.0
> Host: people.redhat.com
> Accept: */*
> 
< HTTP/1.1 206 Partial Content
< Date: Sat, 04 Jul 2015 15:06:36 GMT
* Server Apache is not blacklisted
< Server: Apache
< Last-Modified: Sat, 04 Jul 2015 15:06:06 GMT
< ETag: "2-51a0e030688e9"
< Accept-Ranges: bytes
< Content-Length: 2
< Content-Range: bytes 0-1/2
< Connection: close
< 
* Closing connection 0
hisspreitz@sspreitz:~/workspace/tahoefuse/src$ curl -v -r 0-2 http://people.redhat.com/sspreitz/hi
* Hostname was NOT found in DNS cache
*   Trying 10.5.19.28...
* Connected to people.redhat.com (10.5.19.28) port 80 (#0)
> GET /sspreitz/hi HTTP/1.1
> Range: bytes=0-2
> User-Agent: curl/7.37.0
> Host: people.redhat.com
> Accept: */*
> 
< HTTP/1.1 206 Partial Content
< Date: Sat, 04 Jul 2015 15:06:42 GMT
* Server Apache is not blacklisted
< Server: Apache
< Last-Modified: Sat, 04 Jul 2015 15:06:06 GMT
< ETag: "2-51a0e030688e9"
< Accept-Ranges: bytes
< Content-Length: 2
< Content-Range: bytes 0-1/2
< Connection: close
< 
* Closing connection 0