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http: reset the header buffer when sending the request

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A reused transfer handle could otherwise reuse the previous leftover
buffer and havoc would ensue.

Reported-by: sergio-nsk on github
Fixes #7018
Closes #7021
This commit is contained in:
Daniel Stenberg 2021-05-06 09:35:18 +02:00
parent e2497c73f9
commit 04cc27460e
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1 changed files with 4 additions and 0 deletions
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4
lib/http.c
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@ -3120,6 +3120,10 @@ CURLcode Curl_http(struct Curl_easy *data, bool *done)
/* initialize a dynamic send-buffer */
Curl_dyn_init(&req, DYN_HTTP_REQUEST);
/* make sure the header buffer is reset - if there are leftovers from a
previous transfer */
Curl_dyn_reset(&data->state.headerb);
/* add the main request stuff */
/* GET/HEAD/POST/PUT */
result = Curl_dyn_addf(&req, "%s ", request);