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ProtocolServer: Stream the downloaded data if possible

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This patchset makes ProtocolServer stream the downloads to its client
(LibProtocol), and as such changes the download API; a possible
download lifecycle could be as such:
notation = client->server:'>', server->client:'<', pipe activity:'*'
```
> StartDownload(GET, url, headers, {})
< Response(0, fd 8)
* {data, 1024b}
< HeadersBecameAvailable(0, response_headers, 200)
< DownloadProgress(0, 4K, 1024)
* {data, 1024b}
* {data, 1024b}
< DownloadProgress(0, 4K, 2048)
* {data, 1024b}
< DownloadProgress(0, 4K, 1024)
< DownloadFinished(0, true, 4K)
```

Since managing the received file descriptor is a pain, LibProtocol
implements `Download::stream_into(OutputStream)`, which can be used to
stream the download into any given output stream (be it a file, or
memory, or writing stuff with a delay, etc.).
Also, as some of the users of this API require all the downloaded data
upfront, LibProtocol also implements `set_should_buffer_all_input()`,
which causes the download instance to buffer all the data until the
download is complete, and to call the `on_buffered_download_finish`
hook.
This commit is contained in:
AnotherTest 2020-12-26 17:14:12 +03:30 • committed by Andreas Kling
parent 36d642ee75
commit 4a2da10e38
55 changed files with 528 additions and 235 deletions
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4
Libraries/LibWeb/Loader/Resource.cpp
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@ -84,10 +84,10 @@ static String mime_type_from_content_type(const String& content_type)
return content_type;
}
void Resource::did_load(Badge<ResourceLoader>, const ByteBuffer& data, const HashMap<String, String, CaseInsensitiveStringTraits>& headers)
void Resource::did_load(Badge<ResourceLoader>, ReadonlyBytes data, const HashMap<String, String, CaseInsensitiveStringTraits>& headers)
{
ASSERT(!m_loaded);
m_encoded_data = data;
m_encoded_data = ByteBuffer::copy(data);
m_response_headers = headers;
m_loaded = true;