问题
I need to transfer a huge file from local machine to remote machine using libcurl with C++. Is there any compression option available in-built with libcurl. As the data to be transferred is large (100 MB to 1 GB in size), it would be better if we have any such options available in libcurl itself. I know we can compress the data and send it via libcurl. But just want to know is there any better way of doing so.
Note: In my case, many client machines transfer such huge data to remote server at regular interval of time.
thanks, Prabu
回答1:
According to curl_setopt() and options CURLOPT_ENCODING, you may specify:
The contents of the "Accept-Encoding: " header. This enables decoding of the response. Supported encodings are "identity", "deflate", and "gzip". If an empty string, "", is set, a header containing all supported encoding types is sent.
Here are some examples (just hit search in your browser and type in compression), but I don't know hot exactly does it work and whether it expect already gzipped data.
You still may use gzcompress() and send compressed chunks on your own (and I would do the task this way... you'll have better control on what's actually going on and you'll be able to change used algorithms).
回答2:
You need to send your file with zlib compression by yourself. And perhaps there are some modification needed on the server-side.
来源：https://stackoverflow.com/questions/13379888/is-there-any-compression-available-in-libcurl