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Documentation: Remove now-obsolete patch from Servo's DevTools parser

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They have fixed the exception mentioned here, but the script still has
trouble displaying all live-captured packets.
This commit is contained in:
Timothy Flynn 2025-04-17 08:19:38 -04:00 • committed by Tim Flynn
parent 83b6803b32
commit cef714732e
Notes: github-actions[bot] 2025-04-17 16:13:50 +00:00
1 changed files with 5 additions and 23 deletions
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28
Documentation/DevTools.md
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@ -489,27 +489,9 @@ to listen on this port and pretty-print the JSON packets. You will have to insta
https://github.com/servo/servo/blob/main/etc/devtools_parser.py
You may run into issues with the latest version of Firefox using this script directly, such as exceptions being thrown
while decoding packets. The following patch helps with this:
```diff
diff --git a/etc/devtools_parser.py b/etc/devtools_parser.py
index d33a4ee330..3d5dc74a32 100755
--- a/etc/devtools_parser.py
+++ b/etc/devtools_parser.py
@@ -118,7 +118,7 @@ def process_data(out, port):
continue
try:
dec = bytearray.fromhex(curr_data).decode()
- except UnicodeError:
+ except:
continue
indices = [m.span() for m in re.finditer(pattern, dec)]
```
Since such exceptions are hit fairly regularly, it is recommended to run this script in two phases. First, use the script
to snoop on the DevTools port and write out a packet capture. You may need to run this script with `sudo`.
You may run into cases where the script does not log all captured packets. Since this occurs fairly regularly, it is
recommended to run this script in two phases. First, use the script to snoop on the DevTools port and write out a packet
capture. You may need to run this script with `sudo`.
```bash
./etc/devtools_parser.py -s /tmp/devtools.pcap -p 6000
@ -522,8 +504,8 @@ Now, use `about:debugging` to connect to the Firefox DevTools server and inspect
exercise the feature you wish to implement.
Once complete, use `ctrl+c` on Servo's snooping script to complete the capture. The script will try to print all packets
at this point, but due to the aforementioned exceptions, it is likely that this will not print everything. So we can use
the script again to inspect the now-existing .pcap, and it seems to have better luck printing everything this way:
at this point, but due to the aforementioned incomplete logging, it is likely that this will not print everything. So we
can use the script again to inspect the now-existing .pcap, and it should be able to print everything this way:
```bash
./etc/devtools_parser.py --use /tmp/devtools.pcap -p 6000