PDF preview of LaTeX Workshop (code-server) results in HTTP 400: Bad Request

[benz0li]

Bug description

code-server: coder/code-server#6667

JupyterLab:

[I 2024-02-13 15:50:09.573 ServerApp] Trying to establish websocket connection to ws://localhost:56227/proxy/39607/
[E 2024-02-13 15:50:09.579 ServerApp] Uncaught exception GET /code-server/proxy/39607/ (192.168.65.1)
    HTTPServerRequest(protocol='http', host='127.0.0.1:8888', method='GET', uri='/code-server/proxy/39607/', version='HTTP/1.1', remote_ip='192.168.65.1')
    Traceback (most recent call last):
      File "/usr/local/lib/python3.11/site-packages/tornado/websocket.py", line 940, in _accept_connection
        await open_result
      File "/usr/local/lib/python3.11/site-packages/jupyter_server_proxy/handlers.py", line 853, in open
        return await super().open(path)
               ^^^^^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib/python3.11/site-packages/jupyter_server_proxy/handlers.py", line 678, in open
        return await super().open(self.port, path)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib/python3.11/site-packages/jupyter_server_proxy/handlers.py", line 557, in open
        return await self.proxy_open("localhost", port, proxied_path)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib/python3.11/site-packages/jupyter_server_proxy/handlers.py", line 505, in proxy_open
        await start_websocket_connection()
      File "/usr/local/lib/python3.11/site-packages/jupyter_server_proxy/handlers.py", line 492, in start_websocket_connection
        self.ws = await pingable_ws_connect(
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
    tornado.httpclient.HTTPClientError: HTTP 400: Bad Request

How to reproduce

1. [Terminal] Command docker run -it --rm -p 8888:8888 -p 47395:47395 glcr.b-data.ch/jupyterlab/r/verse:latest-devtools
2. [Browser] Open http://127.0.0.1:8888/lab?token=[redacted]
3. [JupyterLab] Click on 'code-server [↗]'
4. [code-server] When asked 'Do you trust the authors of the files in this folder?'
   • Click on 'Yes, I trust the authors'
5. [code-server] Explorer > Right click > New File...: sample.tex
   • Use sample from Code sample
6. [code-server] View > Command Palette... (F1): LaTeX Workshop: Build LaTeX project
7. [code-server] View > Command Palette... (F1): LaTeX Workshop: View LaTeX PDF file in VSCode tab
8. [code-server] File sample.tex: Change \date{2024-02-09} to \date{2024-02-13}

Expected behaviour

The LaTeX PDF file in VSCode tab updates accordingly.

Actual behaviour

The LaTeX PDF file in VSCode tab does not update.

Code sample

Sample $\TeX$ file:

\documentclass{article}

\title{My first document}
\date{2024-02-09}
\author{John Doe}

\begin{document}
  \maketitle
  \newpage

  Hello World!

\end{document}

Your personal set up

• OS:
  • Host: macOS 14.3.1 (Sonoma)
  • Container: Debian 12 (bullseye)
• Version(s):
  • JupyterHub: 4.0.2
  • JupyterLab: 4.1.0
  • Jupyter Server Proxy: 4.1.0
  • code-server: 4.21.1 (Code 1.86.1)
  • LaTeX Workshop: 9.18.0

Full environment

Container:

aiohttp==3.9.3
aiosignal==1.3.1
alembic==1.13.1
anyio==4.2.0
argon2-cffi==23.1.0
argon2-cffi-bindings==21.2.0
arrow==1.3.0
astroid==3.0.3
asttokens==2.4.1
async-generator==1.10
async-lru==2.0.4
attrs==23.2.0
autopep8==2.0.4
Babel==2.14.0
beautifulsoup4==4.12.3
bleach==6.1.0
certifi==2024.2.2
certipy==0.1.3
cffi==1.16.0
charset-normalizer==3.3.2
colorama==0.4.6
comm==0.2.1
cryptography==42.0.2
debugpy==1.8.1
decorator==5.1.1
defusedxml==0.7.1
dill==0.3.8
docstring-to-markdown==0.13
executing==2.0.1
fastjsonschema==2.19.1
flake8==7.0.0
fqdn==1.5.1
frozenlist==1.4.1
gitdb==4.0.11
GitPython==3.1.41
greenlet==3.0.3
h11==0.14.0
httpcore==1.0.2
httpx==0.26.0
idna==3.6
importlib-metadata==7.0.1
ipykernel==6.29.2
ipython==8.21.0
ipython-genutils==0.2.0
isoduration==20.11.0
isort==5.13.2
jedi==0.19.1
Jinja2==3.1.3
json5==0.9.14
jsonpointer==2.4
jsonschema==4.21.1
jsonschema-specifications==2023.12.1
jupyter-events==0.9.0
jupyter-lsp==2.2.2
jupyter-server-mathjax==0.2.6
jupyter-telemetry==0.1.0
jupyter_client==8.6.0
jupyter_core==5.7.1
jupyter_server==2.12.5
jupyter_server_proxy==4.1.0
jupyter_server_terminals==0.5.2
jupyterhub==4.0.2
jupyterlab==4.1.0
jupyterlab-lsp==5.0.3
jupyterlab_git==0.50.0
jupyterlab_pygments==0.3.0
jupyterlab_server==2.25.2
Mako==1.3.2
MarkupSafe==2.1.5
matplotlib-inline==0.1.6
mccabe==0.7.0
mistune==3.0.2
multidict==6.0.5
nbclassic==1.0.0
nbclient==0.9.0
nbconvert==7.16.0
nbdime==4.0.1
nbformat==5.9.2
nest-asyncio==1.6.0
notebook==7.0.7
notebook_shim==0.2.3
oauthlib==3.2.2
overrides==7.7.0
packaging==23.2
pamela==1.1.0
pandocfilters==1.5.1
parso==0.8.3
pexpect==4.9.0
platformdirs==4.2.0
pluggy==1.4.0
prometheus-client==0.19.0
prompt-toolkit==3.0.43
psutil==5.9.8
ptyprocess==0.7.0
pure-eval==0.2.2
pycodestyle==2.11.1
pycparser==2.21
pydocstyle==6.3.0
pyflakes==3.2.0
Pygments==2.17.2
pylint==3.0.3
pyOpenSSL==24.0.0
python-dateutil==2.8.2
python-json-logger==2.0.7
python-lsp-jsonrpc==1.1.2
python-lsp-server==1.10.0
pytoolconfig==1.3.1
PyYAML==6.0.1
pyzmq==25.1.2
radian==0.6.12
rchitect==0.4.6
referencing==0.33.0
requests==2.31.0
rfc3339-validator==0.1.4
rfc3986-validator==0.1.1
rope==1.12.0
rpds-py==0.17.1
ruamel.yaml==0.18.6
ruamel.yaml.clib==0.2.8
Send2Trash==1.8.2
simpervisor==1.0.0
six==1.16.0
smmap==5.0.1
sniffio==1.3.0
snowballstemmer==2.2.0
soupsieve==2.5
SQLAlchemy==2.0.26
stack-data==0.6.3
terminado==0.18.0
tinycss2==1.2.1
tomli==2.0.1
tomlkit==0.12.3
tornado==6.4
traitlets==5.14.1
types-python-dateutil==2.8.19.20240106
typing_extensions==4.9.0
ujson==5.9.0
uri-template==1.3.0
urllib3==2.2.0
wcwidth==0.2.13
webcolors==1.13
webencodings==0.5.1
websocket-client==1.7.0
whatthepatch==1.0.5
yapf==0.40.2
yarl==1.9.4
zipp==3.17.0

Logs

See Bug description.

[benz0li]

The following works, though:

1. [Terminal] Command docker run -it --rm -p 8888:8888 -p 47395:47395 glcr.b-data.ch/jupyterlab/r/verse:latest-devtools
2. [Browser] Open http://127.0.0.1:8888/lab?token=[redacted]
3. [JupyterLab] Terminal: Command code-server --bind-addr 0.0.0.0:47395 --auth none
4. [Browser] Open http://127.0.0.1:47395/?folder=/home/jovyan/projects
5. [code-server] When asked 'Do you trust the authors of the files in this folder?'
   • Click on 'Yes, I trust the authors'
6. [code-server] Explorer > Right click > New File...: sample.tex
   • Use sample from Code sample
7. [code-server] View > Command Palette... (F1): LaTeX Workshop: Build LaTeX project
8. [code-server] View > Command Palette... (F1): LaTeX Workshop: View LaTeX PDF file in VSCode tab
9. [code-server] File sample.tex: Change \date{2024-02-09} to \date{2024-02-13}

[benz0li]

#445 (comment) also works over https.
ℹ️ See coder/code-server#6667 (comment)

Furthermore, ShinyApps started in code-server are proxied just fine by jupyter-server-proxy:

[I 2024-02-13 16:35:43.241 ServerApp] Trying to establish websocket connection to ws://localhost:46395/proxy/6048/websocket/
[I 2024-02-13 16:35:43.244 ServerApp] Websocket connection established to ws://localhost:46395/proxy/6048/websocket/

---

Code sample

Sample ShinyApp

#
# This is a Shiny web application. You can run the application by clicking
# the 'Run App' button above.
#
# Find out more about building applications with Shiny here:
#
#    http://shiny.rstudio.com/
#

library(shiny)

# Define UI for application that draws a histogram
ui <- fluidPage(
   
   # Application title
   titlePanel("Old Faithful Geyser Data"),
   
   # Sidebar with a slider input for number of bins 
   sidebarLayout(
      sidebarPanel(
         sliderInput("bins",
                     "Number of bins:",
                     min = 1,
                     max = 50,
                     value = 30)
      ),
      
      # Show a plot of the generated distribution
      mainPanel(
         plotOutput("distPlot")
      )
   )
)

# Define server logic required to draw a histogram
server <- function(input, output) {
   
   output$distPlot <- renderPlot({
      # generate bins based on input$bins from ui.R
      x    <- faithful[, 2] 
      bins <- seq(min(x), max(x), length.out = input$bins + 1)
      
      # draw the histogram with the specified number of bins
      hist(x, breaks = bins, col = 'darkgray', border = 'white')
   })
}

# Run the application 
shinyApp(ui = ui, server = server)

[benz0li]

@consideRatio The culprit seems to be Jupyter Server Proxy.

FYI @bdarnell

[benz0li]

@modaresimr Thank you for James-Yu/LaTeX-Workshop#3639.

Maybe you have an idea, why it does not work when code-server is run via Jupyter Server Proxy.

P.S.: I have also whitelisted your GitHub account at https://coder.jupyter.b-data.ch if you want to take a look at this specific setup¹.

Footnotes

1. Traefik: TLS termination, proxy no. 1; JupyterHub: proxy no. 2; JupyterLab: proxy no. 3 (Jupyter Server Proxy); code-server: web app (proxy no. 4) ↩