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Posted to notifications@netbeans.apache.org by GitBox <gi...@apache.org> on 2022/06/07 21:32:16 UTC
[GitHub] [netbeans] jgneff commented on pull request #4206: Make one connection to download a file, not three
jgneff commented on PR #4206:
URL: https://github.com/apache/netbeans/pull/4206#issuecomment-1149189736
I discovered this issue while trying to build NetBeans on [Launchpad](https://launchpad.net/~jgneff/+snap/strictly-netbeans), which uses a local proxy server for all external connections. The bug report [Bug 1948501](https://bugs.launchpad.net/launchpad-buildd/+bug/1948501), "HTTPS proxy returns 503 Service Unavailable," describes the original problem.
For my local tests, I ran [Tinyproxy](https://tinyproxy.github.io) on my workstation at `192.168.1.11` and built NetBeans in an LXD container at `10.203.206.244`. I ran Ant with the target `download-all-extbins` after removing any previously downloaded files. Each build ran with none, both, or one of the following environment variables defined in the container:
```console
$ printenv | grep http
https_proxy=http://192.168.1.11:8888/
http_proxy=http://192.168.1.11:8888/
```
On my workstation, I modified the Tinyproxy configuration at `/etc/tinyproxy/tinyproxy.conf` as follows:
```diff
120c120
< LogLevel Info
---
> LogLevel Connect
224a225
> Allow 10.203.206.0/24
```
A row in each of the tables below represents a build with:
* **None** - No proxy environment variables
* **Both** - Both proxy environment variables
* **HTTP** - Only the `http_proxy` environment variable
* **HTTPS** - Only the `https_proxy` environment variable
Note that all connections made to an external host used a secure HTTPS connection. The type of connection in the columns below indicates only which proxy was used: HTTP for the proxy defined by the `http_proxy` environment variable, and HTTPS for the proxy defined by the `https_proxy` environment variable.
### Before the fix
The table below shows the number and types of connections made before the fix.
**Connections made:**
| Variables | Made | Direct | HTTP | HTTPS |
|-----------|-----:|-------:|-----:|------:|
| None | 565 | 565 | 0 | 0 |
| Both | 1263 | 565 | 349 | 349 |
| HTTP | 1130 | 565 | 565 | 0 |
| HTTPS | 1130 | 565 | 0 | 565 |
The table below shows the types of connections actually used before the fix.
**Connections used:**
| Variables | Used | Direct | HTTP | HTTPS |
|-----------|-----:|-------:|-----:|------:|
| None | 565 | 565 | 0 | 0 |
| Both | 565 | 550 | 14 | 1 |
| HTTP | 565 | 119 | 446 | 0 |
| HTTPS | 565 | 550 | 0 | 15 |
### After the fix
The table below shows the number and types of connections made after the fix.
**Connections made:**
| Variables | Made | Direct | HTTP | HTTPS |
|-----------|-----:|-------:|-----:|------:|
| None | 565 | 565 | 0 | 0 |
| Both | 565 | 0 | 565 | 0 |
| HTTP | 565 | 0 | 565 | 0 |
| HTTPS | 565 | 0 | 0 | 565 |
After the fix, each of the 565 connections made were in fact used to transfer a file.
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