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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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10
Services/ProtocolServer/Download.cpp
View file

@ -33,9 +33,10 @@ namespace ProtocolServer {
// FIXME: What about rollover?
static i32 s_next_id = 1;
Download::Download(ClientConnection& client)
Download::Download(ClientConnection& client, NonnullOwnPtr<OutputFileStream>&& output_stream)
: m_client(client)
, m_id(s_next_id++)
, m_output_stream(move(output_stream))
{
}
@ -48,15 +49,10 @@ void Download::stop()
m_client.did_finish_download({}, *this, false);
}
void Download::set_payload(const ByteBuffer& payload)
{
m_payload = payload;
m_total_size = payload.size();
}
void Download::set_response_headers(const HashMap<String, String, CaseInsensitiveStringTraits>& response_headers)
{
m_response_headers = response_headers;
m_client.did_receive_headers({}, *this);
}
void Download::set_certificate(String, String)