98 lines
2.4 KiB
Markdown
98 lines
2.4 KiB
Markdown
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# h2i
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**h2i** is an interactive HTTP/2 ("h2") console debugger. Miss the good ol'
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days of telnetting to your HTTP/1.n servers? We're bringing you
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back.
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Features:
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- send raw HTTP/2 frames
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- PING
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- SETTINGS
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- HEADERS
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- etc
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- type in HTTP/1.n and have it auto-HPACK/frame-ify it for HTTP/2
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- pretty print all received HTTP/2 frames from the peer (including HPACK decoding)
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- tab completion of commands, options
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Not yet features, but soon:
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- unnecessary CONTINUATION frames on short boundaries, to test peer implementations
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- request bodies (DATA frames)
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- send invalid frames for testing server implementations (supported by underlying Framer)
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Later:
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- act like a server
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## Installation
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```
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$ go get golang.org/x/net/http2/h2i
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$ h2i <host>
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```
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## Demo
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```
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$ h2i
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Usage: h2i <hostname>
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-insecure
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Whether to skip TLS cert validation
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-nextproto string
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Comma-separated list of NPN/ALPN protocol names to negotiate. (default "h2,h2-14")
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$ h2i google.com
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Connecting to google.com:443 ...
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Connected to 74.125.224.41:443
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Negotiated protocol "h2-14"
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[FrameHeader SETTINGS len=18]
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[MAX_CONCURRENT_STREAMS = 100]
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[INITIAL_WINDOW_SIZE = 1048576]
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[MAX_FRAME_SIZE = 16384]
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[FrameHeader WINDOW_UPDATE len=4]
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Window-Increment = 983041
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h2i> PING h2iSayHI
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[FrameHeader PING flags=ACK len=8]
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Data = "h2iSayHI"
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h2i> headers
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(as HTTP/1.1)> GET / HTTP/1.1
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(as HTTP/1.1)> Host: ip.appspot.com
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(as HTTP/1.1)> User-Agent: h2i/brad-n-blake
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(as HTTP/1.1)>
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Opening Stream-ID 1:
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:authority = ip.appspot.com
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:method = GET
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:path = /
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:scheme = https
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user-agent = h2i/brad-n-blake
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[FrameHeader HEADERS flags=END_HEADERS stream=1 len=77]
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:status = "200"
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alternate-protocol = "443:quic,p=1"
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content-length = "15"
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content-type = "text/html"
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date = "Fri, 01 May 2015 23:06:56 GMT"
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server = "Google Frontend"
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[FrameHeader DATA flags=END_STREAM stream=1 len=15]
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"173.164.155.78\n"
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[FrameHeader PING len=8]
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Data = "\x00\x00\x00\x00\x00\x00\x00\x00"
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h2i> ping
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[FrameHeader PING flags=ACK len=8]
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Data = "h2i_ping"
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h2i> ping
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[FrameHeader PING flags=ACK len=8]
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Data = "h2i_ping"
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h2i> ping
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[FrameHeader GOAWAY len=22]
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Last-Stream-ID = 1; Error-Code = PROTOCOL_ERROR (1)
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ReadFrame: EOF
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```
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## Status
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Quick few hour hack. So much yet to do. Feel free to file issues for
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bugs or wishlist items, but [@bmizerany](https://github.com/bmizerany/)
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and I aren't yet accepting pull requests until things settle down.
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