HttpBinaryCacheStore: Support upsertFile with PUT.

Some servers, such as Artifactory, allow uploading with PUT and BASIC
auth. This allows nix copy to work to upload binaries to those
servers.

Worked on together with @adelbertc

1 files changed, 27 insertions, 1 deletions

diff --git a/src/libstore/download.cc b/src/libstore/download.cc
index ef417685f1..4b37826c46 100644
--- a/src/libstore/download.cc
+++ b/src/libstore/download.cc
@@ -22,6 +22,7 @@
 #include <thread>
 #include <cmath>
 #include <random>
+#include <algorithm>
 
 using namespace std::string_literals;
 
@@ -91,6 +92,8 @@ struct CurlDownloader : public Downloader
         {
             if (!request.expectedETag.empty())
                 requestHeaders = curl_slist_append(requestHeaders, ("If-None-Match: " + request.expectedETag).c_str());
+            if (!request.mimeType.empty())
+                requestHeaders = curl_slist_append(requestHeaders, ("Content-Type: " + request.mimeType).c_str());
         }
 
         ~DownloadItem()
@@ -185,6 +188,22 @@ struct CurlDownloader : public Downloader
             return 0;
         }
 
+        size_t readOffset = 0;
+        int readCallback(char *buffer, size_t size, size_t nitems)
+        {
+            if (readOffset == request.data->length())
+                return 0;
+            auto count = std::min(size * nitems, request.data->length() - readOffset);
+            memcpy(buffer, request.data->data() + readOffset, count);
+            readOffset += count;
+            return count;
+        }
+
+        static int readCallbackWrapper(char *buffer, size_t size, size_t nitems, void * userp)
+        {
+            return ((DownloadItem *) userp)->readCallback(buffer, size, nitems);
+        }
+
         long lowSpeedTimeout = 300;
 
         void init()
@@ -225,6 +244,13 @@ struct CurlDownloader : public Downloader
             if (request.head)
                 curl_easy_setopt(req, CURLOPT_NOBODY, 1);
 
+            if (request.data) {
+                curl_easy_setopt(req, CURLOPT_UPLOAD, 1L);
+                curl_easy_setopt(req, CURLOPT_READFUNCTION, readCallbackWrapper);
+                curl_easy_setopt(req, CURLOPT_READDATA, this);
+                curl_easy_setopt(req, CURLOPT_INFILESIZE_LARGE, (curl_off_t) request.data->length());
+            }
+
             if (request.verifyTLS) {
                 if (settings.caFile != "")
                     curl_easy_setopt(req, CURLOPT_CAINFO, settings.caFile.c_str());
@@ -265,7 +291,7 @@ struct CurlDownloader : public Downloader
             }
 
             if (code == CURLE_OK &&
-                (httpStatus == 200 || httpStatus == 304 || httpStatus == 226 /* FTP */ || httpStatus == 0 /* other protocol */))
+                (httpStatus == 200 || httpStatus == 201 || httpStatus == 204 || httpStatus == 304 || httpStatus == 226 /* FTP */ || httpStatus == 0 /* other protocol */))
             {
                 result.cached = httpStatus == 304;
                 done = true;