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BinaryCacheStore::readFile(): Return a shared_ptr to a string

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This allows readFile() to indicate that a file doesn't exist, and
might eliminate some large string copying.
This commit is contained in:
Eelco Dolstra 2016-04-15 15:11:34 +02:00
parent 99851c6f06
commit d1b0909894
11 changed files with 52 additions and 28 deletions
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10
src/libstore/http-binary-cache-store.cc
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@ -58,12 +58,18 @@ protected:
throw Error("uploading to an HTTP binary cache is not supported");
}
std::string getFile(const std::string & path) override
std::shared_ptr<std::string> getFile(const std::string & path) override
{
auto downloader(downloaders.get());
DownloadOptions options;
options.showProgress = DownloadOptions::no;
return downloader->download(cacheUri + "/" + path, options).data;
try {
return downloader->download(cacheUri + "/" + path, options).data;
} catch (DownloadError & e) {
if (e.error == Downloader::NotFound || e.error == Downloader::Forbidden)
return 0;
throw;
}
}
};