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CURLOPT_ERRORBUFFER.3: Clarify it may not be written to on error #2190

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CURLOPT_ERRORBUFFER.3: Clarify it may not be written to on error #2190

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@jay jay commented Dec 23, 2017

  • Advise the user to set the error buffer to an empty string before each
    request.

Bug: https://curl.haxx.se/mail/lib-2017-12/0068.html
Reported-by: Martin Galvan
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CURLOPT_ERRORBUFFER.3: Clarify it may not be written to on error
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0f911aa 
- Advise the user to set the error buffer to an empty string before each
  request.

Bug: https://curl.haxx.se/mail/lib-2017-12/0068.html
Reported-by: Martin Galvan
@jay jay added the documentation label Dec 23, 2017
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@jay jay commented Dec 23, 2017

alternately we could change this in the library to zero it out before each request, but I'm concerned we may miss some error code since errors can happen anywhere
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bagder approved these changes Jan 15, 2018
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@bagder bagder left a comment

I think this improves the documentation of how it currently works.
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@jay jay commented Jan 17, 2018

I'm going to back away from the It's advised to set the error buffer to an empty string before each request.. Instead I think it seems practical that the library would zero it for the user on perform.
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@bagder bagder commented Jan 17, 2018

@jay: that will indeed be the most user-friendly approach!
bagder added a commit that referenced this pull request Mar 12, 2018
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curl_multi_add_handle: clear errorbuffer if set
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To offer applications a more defined behavior.

Bug #2190
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bagder added a commit that referenced this pull request Mar 12, 2018
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curl_multi_add_handle/easy_perform: clear errorbuffer if set
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To offer applications a more defined behavior, we clear the buffer as
early as possible.

Bug #2190
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@bagder bagder commented Mar 12, 2018

See #2377 for a take at making it cleared early on.
@bagder bagder closed this in fb4f568 Mar 17, 2018
@jay jay deleted the jay:fix_doc_ERRORBUFFER branch Mar 17, 2018
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