On Fri, 17 Dec 2004, Tilmann Haug wrote:
According to our customer who runs the proxy: "POST http://213.160.26.42:65535/tunneler/F_OD-ROX-EV_DE11026194861081899800793 HTTP/1.1" Is that sufficient? Can i get more logging information?
Applet confused about what it is supposed to talk to..
Is there a general difference in the proxy use for the following configuration:
a) proxy use is done in the browser
b) gateways based routing over the proxy?
Yes, the two setups are very different.
'a' is standard, but requires all software used to be proxy aware. The Java JRE versions have had a long history of various bugs in their proxy awareness, mostly due to Java mostly living a life of it's own within the browser. In addition some of the Java security constraints becomes a bit odd when using a proxy, mostly due to a misplaced concept of trustworthiness (or lack thereof).
'b' violates specifications, but sometimes makes life easier as application software (browsers etc) does not need to be proxy aware.
Only use the basic http primitives which relies on the browser http implementation, not some Java http implementation ontop of the Java TCP direct network connections.
Very interersting and pretty good advice. ould you be so kind and exlain a bit more in detail? Especially the "on top of java section".
Java has multiple methods of accessing the network
- Broser HTTP primitives, which are supposed to use the browser functions to access the network.
- Direct TCP/IP network access, where Java bypasses the browser and accesses the network stack of the client computer directly.
- Various protocol implementations ontop of the direct network access, including a reasonable HTTP client among a lot of other protocol.
Only the first works well via a proxy. Some versions of JRE also manages to guess the proxy settings when using the Java HTTP client, but this is often broken as this interface is not intended to be used in this manner and mostly intended to be used in Java applications (not applets) where one is not running inside the browser and consequently does not have the browser available for networking..
As I am not a Java programmer I don't have the exact names of the different Java interfaces, but it should not be too hard to find. I only know the capabilities are there.
Regards Henrik
