Skip to content

N
nghttp2
Commit fd07247a authored by Tatsuhiro Tsujikawa's avatar Tatsuhiro Tsujikawa
Browse files
Options

Update doc

parent da9bbb58
Show whitespace changes
Inline Side-by-side
Showing with 448 additions and 313 deletions
README.rst
View file @ fd07247a
......@@ -429,41 +429,45 @@ The ``src`` directory contains HPACK tools. The ``deflatehd`` is
command-line header compression tool. The ``inflatehd`` is
command-line header decompression tool. Both tools read input from
stdin and write output to stdout. The errors are written to
stderr. They take JSON as input and output.
stderr. They take JSON as input and output. We use the same JSON data
format used in https://github.com/Jxck/hpack-test-case
deflatehd - header compressor
+++++++++++++++++++++++++++++
The ``deflatehd`` reads JSON array or HTTP/1-style header fields from
stdin and outputs compressed header block in JSON array.
The ``deflatehd`` reads JSON data or HTTP/1-style header fields from
stdin and outputs compressed header block in JSON.
For the JSON input, the element of input array must be a JSON
object. Each object must have at least following key:
headers
A JSON array of name/value pairs. The each element is a JSON array
of 2 strings. The index 0 must contain header name and the index 1
must contain header value.
For the JSON input, the root JSON object must contain ``context`` key,
which indicates which compression context is used. If it is
``request``, request compression context is used. Otherwise, response
compression context is used. The value of ``cases`` key contains the
sequence of input header set. They share the same compression context
and are processed in the order they appear. Each item in the sequence
is a JSON object and it must have at least ``headers`` key. Its value
is an array of a JSON object containing exactly one name/value pair.
Example::
{
"context": "request",
"cases":
[
{
"headers": [
[ ":method", "GET" ],
[ ":path", "/" ]
{ ":method": "GET" },
{ ":path": "/" }
]
},
{
"headers": [
[ ":method", "POST" ],
[ ":path", "/" ]
{ ":method": "POST" },
{ ":path": "/" }
]
}
]
}
These header sets are processed in the order they appear in the JSON
outer most array using same compression context.
With ``-t`` option, the program can accept more familiar HTTP/1 style
header field block. Each header set is delimited by empty line:
......@@ -477,46 +481,97 @@ Example::
:method: POST
user-agent: nghttp2
The output is a JSON array and each element is JSON object, which has
at least following keys:
The output is JSON object. It contains ``context`` key and its value
is ``request`` if the compression context is request, otherwise
``response``. The root JSON object also contains ``cases`` key and its
value is an array of JSON object, which has at least following keys:
seq
The index of header set in the input.
inputLen
input_length
The sum of length of name/value pair in the input.
outputLength
output_length
The length of compressed header block.
percentageOfOriginalSize
inputLen / outputLength * 100
percentage_of_original_size
``input_length`` / ``output_length`` * 100
output
wire
The compressed header block in hex string.
headers
The input header set.
header_table_size
The header table size adjsuted before deflating header set.
Examples::
{
"context": "request",
"cases":
[
{
"seq": 0,
"inputLen": 66,
"outputLength": 20,
"percentageOfOriginalSize": 30.303030303030305,
"output": "818703881f3468e5891afcbf863c856659c62e3f"
"input_length": 66,
"output_length": 20,
"percentage_of_original_size": 30.303030303030305,
"wire": "01881f3468e5891afcbf83868a3d856659c62e3f",
"headers": [
{
":authority": "example.org"
},
{
":method": "GET"
},
{
":path": "/"
},
{
":scheme": "https"
},
{
"user-agent": "nghttp2"
}
],
"header_table_size": 4096
}
,
{
"seq": 1,
"inputLen": 74,
"outputLength": 10,
"percentageOfOriginalSize": 13.513513513513514,
"output": "87038504252dd5918386"
"input_length": 74,
"output_length": 10,
"percentage_of_original_size": 13.513513513513514,
"wire": "88448504252dd5918485",
"headers": [
{
":authority": "example.org"
},
{
":method": "POST"
},
{
":path": "/account"
},
{
":scheme": "https"
},
{
"user-agent": "nghttp2"
}
],
"header_table_size": 4096
}
]
}
The output can be used as the input for ``inflatehd``.
With ``-d`` option, the extra ``headerTable`` key is added and its
The output can be used as the input for ``inflatehd`` and
``deflatehd``.
With ``-d`` option, the extra ``header_table`` key is added and its
associated value contains the state of dyanmic header table after the
corresponding header set was processed. The value contains following
keys:
......@@ -535,58 +590,73 @@ size
The sum of the spaces entries occupied, this includes the
entry overhead.
maxSize
max_size
The maximum header table size.
deflateSize
The sum of the spaces entries occupied within ``maxDeflateSize``.
deflate_size
The sum of the spaces entries occupied within
``max_deflate_size``.
maxDeflateSize
max_deflate_size
The maximum header table size encoder uses. This can be smaller
than ``maxSize``. In this case, encoder only uses up to first
``maxDeflateSize`` buffer. Since the header table size is still
``maxSize``, the encoder has to keep track of entries ouside the
``maxDeflateSize`` but inside the ``maxSize`` and make sure that
they are no longer referenced.
than ``max_size``. In this case, encoder only uses up to first
``max_deflate_size`` buffer. Since the header table size is still
``max_size``, the encoder has to keep track of entries ouside the
``max_deflate_size`` but inside the ``max_size`` and make sure
that they are no longer referenced.
Example::
{
"context": "request",
"cases":
[
{
"seq": 0,
"inputLen": 66,
"outputLength": 20,
"percentageOfOriginalSize": 30.303030303030305,
"output": "818703881f3468e5891afcbf863c856659c62e3f",
"headerTable": {
"input_length": 66,
"output_length": 20,
"percentage_of_original_size": 30.303030303030305,
"wire": "01881f3468e5891afcbf83868a3d856659c62e3f",
"headers": [
{
":authority": "example.org"
},
{
":method": "GET"
},
{
":path": "/"
},
{
":scheme": "https"
},
{
"user-agent": "nghttp2"
}
],
"header_table_size": 4096,
"header_table": {
"entries": [
{
"index": 0,
"index": 1,
"name": "user-agent",
"value": "nghttp2",
"referenced": true,
"size": 49
},
{
"index": 1,
"name": ":path",
"value": "/",
"referenced": true,
"size": 38
},
{
"index": 2,
"name": ":authority",
"value": "example.org",
"name": ":scheme",
"value": "https",
"referenced": true,
"size": 53
"size": 44
},
{
"index": 3,
"name": ":scheme",
"value": "https",
"name": ":path",
"value": "/",
"referenced": true,
"size": 44
"size": 38
},
{
"index": 4,
......@@ -594,29 +664,48 @@ Example::
"value": "GET",
"referenced": true,
"size": 42
},
{
"index": 5,
"name": ":authority",
"value": "example.org",
"referenced": true,
"size": 53
}
],
"size": 226,
"maxSize": 4096,
"deflateSize": 226,
"maxDeflateSize": 4096
"max_size": 4096,
"deflate_size": 226,
"max_deflate_size": 4096
}
},
}
,
{
"seq": 1,
"inputLen": 74,
"outputLength": 10,
"percentageOfOriginalSize": 13.513513513513514,
"output": "87038504252dd5918386",
"headerTable": {
"entries": [
"input_length": 74,
"output_length": 10,
"percentage_of_original_size": 13.513513513513514,
"wire": "88448504252dd5918485",
"headers": [
{
"index": 0,
"name": ":path",
"value": "/account",
"referenced": true,
"size": 45
":authority": "example.org"
},
{
":method": "POST"
},
{
":path": "/account"
},
{
":scheme": "https"
},
{
"user-agent": "nghttp2"
}
],
"header_table_size": 4096,
"header_table": {
"entries": [
{
"index": 1,
"name": ":method",
......@@ -633,98 +722,144 @@ Example::
},
{
"index": 3,
"name": ":scheme",
"value": "https",
"referenced": true,
"size": 44
},
{
"index": 4,
"name": ":path",
"value": "/",
"referenced": false,
"size": 38
},
{
"index": 4,
"name": ":authority",
"value": "example.org",
"referenced": true,
"size": 53
},
{
"index": 5,
"name": ":scheme",
"value": "https",
"referenced": true,
"size": 44
},
{
"index": 6,
"name": ":method",
"value": "GET",
"referenced": false,
"size": 42
},
{
"index": 6,
"name": ":authority",
"value": "example.org",
"referenced": true,
"size": 53
}
],
"size": 314,
"maxSize": 4096,
"deflateSize": 314,
"maxDeflateSize": 4096
"size": 269,
"max_size": 4096,
"deflate_size": 269,
"max_deflate_size": 4096
}
}
]
}
inflatehd - header decompressor
+++++++++++++++++++++++++++++++
The ``inflatehd`` reads JSON array from stdin and outputs decompressed
name/value pairs in JSON array. The element of input array must be a
JSON object. Each object must have at least following key:
The ``inflatehd`` reads JSON data from stdin and outputs decompressed
name/value pairs in JSON.
output
compressed header block in hex string.
The root JSON object must contain ``context`` key, which indicates
which compression context is used. If it is ``request``, request
compression context is used. Otherwise, response compression context
is used. The value of ``cases`` key contains the sequence of
compressed header block. They share the same compression context and
are processed in the order they appear. Each item in the sequence is a
JSON object and it must have at least ``wire`` key. Its value is a
string containing compressed header block in hex string.
Example::
{
"context": "request",
"cases":
[
{ "output": "0284f77778ff" },
{ "output": "0185fafd3c3c7f81" }
{ "wire": "8285" },
{ "wire": "8583" }
]
}
The output is a JSON array and each element is JSON object, which has
at least following keys:
The output is JSON object. It contains ``context`` key and its value
is ``request`` if the compression context is request, otherwise
``response``. The root JSON object also contains ``cases`` key and its
value is an array of JSON object, which has at least following keys:
seq
The index of header set in the input.
headers
The JSON array contains decompressed name/value pairs. Each
element is JSON aray having 2 elements. The index 0 of the array
contains the header field name. The index 1 contains the header
field value.
The JSON array contains decompressed name/value pairs.
wire
The compressed header block in hex string.
header_table_size
The header table size adjsuted before inflating compressed header
block.
Example::
{
"context": "request",
"cases":
[
{
"seq": 0,
"wire": "01881f3468e5891afcbf83868a3d856659c62e3f",
"headers": [
[":authority", "example.org"],
[":method", "GET"],
[":path", "/"],
[":scheme", "https"],
["user-agent", "nghttp2"]
]
{
":authority": "example.org"
},
{
":method": "GET"
},
{
":path": "/"
},
{
":scheme": "https"
},
{
"user-agent": "nghttp2"
}
],
"header_table_size": 4096
}
,
{
"seq": 1,
"wire": "88448504252dd5918485",
"headers": [
[":authority", "example.org"],
[":method", "POST"],
[":path", "/account"],
[":scheme", "https"],
["user-agent", "nghttp2"]
]
{
":method": "POST"
},
{
":path": "/account"
},
{
"user-agent": "nghttp2"
},
{
":scheme": "https"
},
{
":authority": "example.org"
}
],
"header_table_size": 4096
}
]
}
The output can be used as the input for ``deflatehd``.
The output can be used as the input for ``deflatehd`` and
``inflatehd``.
With ``-d`` option, the extra ``headerTable`` key is added and its
With ``-d`` option, the extra ``header_table`` key is added and its
associated value contains the state of dyanmic header table after the
corresponding header set was processed. The format is the same as
``deflatehd``.
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment