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CC-Tweaked/doc/events/http_failure.md
Jonathan Coates 895bc7721a
License CC:T according to the REUSE specification (#1351) 
This adds SPDX license headers to all source code files, following the
REUSE[1] specification. This does not include any asset files (such as
generated JSON files, or textures). While REUSE does support doing so
with ".license" files, for now we define these licences using the
.reuse/dep5 file.

[1]: https://reuse.software/
2023-03-15 21:52:13 +00:00

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module: [kind=event] http_failure see: http.request To send an HTTP request.

The @{http_failure} event is fired when an HTTP request fails.

This event is normally handled inside @{http.get} and @{http.post}, but it can still be seen when using @{http.request}.

Return Values

  1. @{string}: The event name.
  2. @{string}: The URL of the site requested.
  3. @{string}: An error describing the failure.
  4. @{http.Response}|@{nil}: A response handle if the connection succeeded, but the server's response indicated failure.

Example

Prints an error why the website cannot be contacted:

local myURL = "https://does.not.exist.tweaked.cc"
http.request(myURL)
local event, url, err
repeat
    event, url, err = os.pullEvent("http_failure")
until url == myURL
print("The URL " .. url .. " could not be reached: " .. err)

Prints the contents of a webpage that does not exist:

local myURL = "https://tweaked.cc/this/does/not/exist"
http.request(myURL)
local event, url, err, handle
repeat
    event, url, err, handle = os.pullEvent("http_failure")
until url == myURL
print("The URL " .. url .. " could not be reached: " .. err)
print(handle.getResponseCode())
handle.close()