Proxy configuration not saved

[matthjes]

Hi,

I'm working behind a corporate proxy, so I need to configure the proxy in the IDE. However, when I enter the proxy credentials, close the configuration window, and reopen it again, the credentials are missing. This also happens when I enter the credentials directly into the preferences.txt: as soon as I restart the IDE the credentials get erased.

This happens with version 1.8.5 and 1.9.0 beta.

This problem is also described in this thread: https://forum.arduino.cc/index.php?topic=392432.0

[facchinm]

Hi @matthjes ,
it looks quite strange; a possible explanation is that you don't have write access to your user-wide preferences.txt (which lives in Arduino15 folder, the exact location depends on the operating system in use, C:\Users\username\AppData\Local\Arduino15 in case you are in Windows).
Just to make sure, if you change any other property (like the sketchbook location or the verbosity) are they getting saved on restart?

[per1234]

@matthjes are you still having this problem? We're still waiting for you to provide the information requested by facchinm.

[per1234]

I can reproduce this problem with Arduino IDE 1.8.7 hourly build 2018/10/24 04:33 and Arduino 1.9.0-beta build 87 using Windows 10.

1. Delete or rename your preferences.txt file to simulate a fresh installation. You can find the location of preferences.txt by clicking the link at the line following [File > Preferences > More preferences can be edited directly in the file.
2. File > Preferences
3. Click on the "Network" tab.
4. Select "Manual Proxy Configuration"
5. Enter something in all the input fields.
6. Click "OK"
7. File > Preferences
8. Click on the "Network" tab. The Manual Proxy Configuration Username and Password fields are empty.
9. Click "OK"
10. File > Quit
11. Open preferences.txt. The proxy.manual.password and proxy.manual.username properties are blank.
12. Start the Arduino IDE.
13. File > Preferences
14. Click on the "Network" tab.
15. Select "Auto-detect proxy settings".
16. Enter something in all fields.
17. Click "OK"
18. File > Preferences
19. Click on the "Network" tab. The Auto-detect proxy settings Username and Password fields are still filled.
20. Click "OK"
21. File > Quit
22. Open preferences.txt. The proxy.manual.password and proxy.manual.username properties are set to the values you entered in the Auto-detect proxy settings Username and Password fields.
23. Start the Arduino IDE.
24. File > Preferences
25. Click on the "Network" tab.
26. Select "Manual Proxy Configuration"
27. Click "OK"
28. File > Preferences
29. Click on the "Network" tab. The Manual Proxy Configuration Username and Password fields are now filled with the values you entered in the Auto-detect proxy settings Username and Password fields.

So there is clearly a bug in the Manual Proxy Configuration system. There is no problem writing any other preference and even proxy.manual.hostname and proxy.manual.port work as expected.

It's also not clear whether it was intentional for Auto-detect proxy settings and Manual Proxy Configuration to share the same proxy.manual.username and proxy.manual.password properties or that's a bug.

[solarjoe]

I can confirm this behaviour on Win10, IDE 1.8.8
Auto-config writes and reads to the manual fieldes in preferences.txt.

Also behind a corporate firewal wall and must use a proxy with authentification. I tried several combinations in GUI and preferences.txt without success.

Does the auto configuration also look for the environment variables HTTP_PROXY or HTTPS_PROXY on Windows?

[solarjoe]

I can download the http://downloads.arduino.cc/packages/package_index.json from my browser and I tried to configure the Arduino IDE the same way, without luck.

When trying to update the boards list I get

Caused by: java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required"

I noticed in another thread (#5887) that it could also show something like

Using proxy HTTP @ /192.168.0.254:3128
Caused by: java.io.IOException: Received invalid http status code from server: 416

This is the section from my perferences.txt:

proxy.manual.hostname=x.x.x.x
proxy.manual.password=xxxx
proxy.manual.port=8080
proxy.manual.type=HTTP
proxy.manual.username=xxxx
proxy.pac.url=
proxy.type=manual

[solarjoe]

Could it be related to this?

https://stackoverflow.com/questions/41505219/unable-to-tunnel-through-proxy-proxy-returns-http-1-1-407-via-https

[facchinm]

@solarjoe it might indeed be the case. Since you are on Windows it's a bit tricky to modify that config on the fly but I'm preparing a PR so you can test it and report if jdk.http.auth.tunneling is the culprit.

[facchinm]

PR created here #8436 , binaries should be ready in an hour more or less.

[solarjoe]

I just tested this and it works when I add

-Djdk.http.auth.tunneling.disabledSchemes=""

to the file arduino.l4j.ini or arduino_deubg.l4j.ini where you can pass additional parameters, see
http://launch4j.sourceforge.net/docs.html#Additional_jvm_options

[solarjoe]

I was not testing the new binaries, just modified the installation I had (1.8.8).