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fix: allow redirected HTTP uploads

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When a PUT is redirected, some of the data can be sent by curl before headers are read. This means the subsequent PUT operation needs to seek back to origin.

(cherry picked from commit 90deb665eb)
This commit is contained in:
Thomas Bereknyei 2025-05-01 02:28:17 -04:00 • committed by Mergify
parent 8de4c272dc
commit f9dd4e5605
1 changed files with 19 additions and 0 deletions
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19
src/libstore/filetransfer.cc
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@ -309,6 +309,23 @@ struct curlFileTransfer : public FileTransfer
} }
#endif #endif
size_t seekCallback(curl_off_t offset, int origin)
{
if (origin == SEEK_SET) {
readOffset = offset;
} else if (origin == SEEK_CUR) {
readOffset += offset;
} else if (origin == SEEK_END) {
readOffset = request.data->length() + offset;
}
return CURL_SEEKFUNC_OK;
}
static size_t seekCallbackWrapper(void *clientp, curl_off_t offset, int origin)
{
return ((TransferItem *) clientp)->seekCallback(offset, origin);
}
void init() void init()
{ {
if (!req) req = curl_easy_init(); if (!req) req = curl_easy_init();
@ -361,6 +378,8 @@ struct curlFileTransfer : public FileTransfer
curl_easy_setopt(req, CURLOPT_READFUNCTION, readCallbackWrapper); curl_easy_setopt(req, CURLOPT_READFUNCTION, readCallbackWrapper);
curl_easy_setopt(req, CURLOPT_READDATA, this); curl_easy_setopt(req, CURLOPT_READDATA, this);
curl_easy_setopt(req, CURLOPT_INFILESIZE_LARGE, (curl_off_t) request.data->length()); curl_easy_setopt(req, CURLOPT_INFILESIZE_LARGE, (curl_off_t) request.data->length());
curl_easy_setopt(req, CURLOPT_SEEKFUNCTION, seekCallbackWrapper);
curl_easy_setopt(req, CURLOPT_SEEKDATA, this);
} }
if (request.verifyTLS) { if (request.verifyTLS) {