forked from extern/httpie-cli
294 lines
8.8 KiB
Python
294 lines
8.8 KiB
Python
from itertools import chain
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from functools import partial
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from httpie.compat import str
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from httpie.context import Environment
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from httpie.models import HTTPRequest, HTTPResponse
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from httpie.input import (OUT_REQ_BODY, OUT_REQ_HEAD,
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OUT_RESP_HEAD, OUT_RESP_BODY)
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from httpie.output.processing import Formatting, Conversion
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BINARY_SUPPRESSED_NOTICE = (
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b'\n'
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b'+-----------------------------------------+\n'
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b'| NOTE: binary data not shown in terminal |\n'
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b'+-----------------------------------------+'
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)
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class BinarySuppressedError(Exception):
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"""An error indicating that the body is binary and won't be written,
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e.g., for terminal output)."""
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message = BINARY_SUPPRESSED_NOTICE
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def write(stream, outfile, flush):
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"""Write the output stream."""
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try:
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# Writing bytes so we use the buffer interface (Python 3).
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buf = outfile.buffer
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except AttributeError:
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buf = outfile
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for chunk in stream:
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buf.write(chunk)
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if flush:
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outfile.flush()
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def write_with_colors_win_py3(stream, outfile, flush):
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"""Like `write`, but colorized chunks are written as text
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directly to `outfile` to ensure it gets processed by colorama.
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Applies only to Windows with Python 3 and colorized terminal output.
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"""
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color = b'\x1b['
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encoding = outfile.encoding
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for chunk in stream:
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if color in chunk:
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outfile.write(chunk.decode(encoding))
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else:
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outfile.buffer.write(chunk)
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if flush:
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outfile.flush()
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def build_output_stream(args, env, request, response):
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"""Build and return a chain of iterators over the `request`-`response`
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exchange each of which yields `bytes` chunks.
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"""
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req_h = OUT_REQ_HEAD in args.output_options
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req_b = OUT_REQ_BODY in args.output_options
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resp_h = OUT_RESP_HEAD in args.output_options
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resp_b = OUT_RESP_BODY in args.output_options
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req = req_h or req_b
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resp = resp_h or resp_b
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output = []
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Stream = get_stream_type(env, args)
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if req:
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output.append(Stream(
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msg=HTTPRequest(request),
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with_headers=req_h,
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with_body=req_b))
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if req_b and resp:
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# Request/Response separator.
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output.append([b'\n\n'])
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if resp:
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output.append(Stream(
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msg=HTTPResponse(response),
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with_headers=resp_h,
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with_body=resp_b))
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if env.stdout_isatty and resp_b:
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# Ensure a blank line after the response body.
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# For terminal output only.
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output.append([b'\n\n'])
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return chain(*output)
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def get_stream_type(env, args):
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"""Pick the right stream type based on `env` and `args`.
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Wrap it in a partial with the type-specific args so that
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we don't need to think what stream we are dealing with.
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"""
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if not env.stdout_isatty and not args.prettify:
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Stream = partial(
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RawStream,
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chunk_size=RawStream.CHUNK_SIZE_BY_LINE
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if args.stream
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else RawStream.CHUNK_SIZE
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)
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elif args.prettify:
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Stream = partial(
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PrettyStream if args.stream else BufferedPrettyStream,
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env=env,
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conversion=Conversion(),
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formatting=Formatting(env=env, groups=args.prettify,
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color_scheme=args.style),
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)
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else:
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Stream = partial(EncodedStream, env=env)
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return Stream
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class BaseStream(object):
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"""Base HTTP message output stream class."""
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def __init__(self, msg, with_headers=True, with_body=True,
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on_body_chunk_downloaded=None):
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"""
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:param msg: a :class:`models.HTTPMessage` subclass
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:param with_headers: if `True`, headers will be included
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:param with_body: if `True`, body will be included
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"""
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assert with_headers or with_body
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self.msg = msg
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self.with_headers = with_headers
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self.with_body = with_body
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self.on_body_chunk_downloaded = on_body_chunk_downloaded
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def get_headers(self):
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"""Return the headers' bytes."""
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return self.msg.headers.encode('utf8')
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def iter_body(self):
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"""Return an iterator over the message body."""
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raise NotImplementedError()
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def __iter__(self):
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"""Return an iterator over `self.msg`."""
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if self.with_headers:
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yield self.get_headers()
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yield b'\r\n\r\n'
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if self.with_body:
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try:
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for chunk in self.iter_body():
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yield chunk
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if self.on_body_chunk_downloaded:
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self.on_body_chunk_downloaded(chunk)
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except BinarySuppressedError as e:
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if self.with_headers:
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yield b'\n'
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yield e.message
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class RawStream(BaseStream):
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"""The message is streamed in chunks with no processing."""
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CHUNK_SIZE = 1024 * 100
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CHUNK_SIZE_BY_LINE = 1
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def __init__(self, chunk_size=CHUNK_SIZE, **kwargs):
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super(RawStream, self).__init__(**kwargs)
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self.chunk_size = chunk_size
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def iter_body(self):
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return self.msg.iter_body(self.chunk_size)
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class EncodedStream(BaseStream):
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"""Encoded HTTP message stream.
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The message bytes are converted to an encoding suitable for
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`self.env.stdout`. Unicode errors are replaced and binary data
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is suppressed. The body is always streamed by line.
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"""
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CHUNK_SIZE = 1
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def __init__(self, env=Environment(), **kwargs):
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super(EncodedStream, self).__init__(**kwargs)
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if env.stdout_isatty:
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# Use the encoding supported by the terminal.
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output_encoding = env.stdout_encoding
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else:
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# Preserve the message encoding.
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output_encoding = self.msg.encoding
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# Default to utf8 when unsure.
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self.output_encoding = output_encoding or 'utf8'
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def iter_body(self):
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for line, lf in self.msg.iter_lines(self.CHUNK_SIZE):
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if b'\0' in line:
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raise BinarySuppressedError()
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yield line.decode(self.msg.encoding) \
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.encode(self.output_encoding, 'replace') + lf
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class PrettyStream(EncodedStream):
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"""In addition to :class:`EncodedStream` behaviour, this stream applies
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content processing.
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Useful for long-lived HTTP responses that stream by lines
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such as the Twitter streaming API.
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"""
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CHUNK_SIZE = 1
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def __init__(self, conversion, formatting, **kwargs):
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super(PrettyStream, self).__init__(**kwargs)
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self.formatting = formatting
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self.conversion = conversion
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self.mime = self.msg.content_type.split(';')[0]
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def get_headers(self):
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return self.formatting.format_headers(
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self.msg.headers).encode(self.output_encoding)
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def iter_body(self):
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first_chunk = True
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iter_lines = self.msg.iter_lines(self.CHUNK_SIZE)
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for line, lf in iter_lines:
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if b'\0' in line:
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if first_chunk:
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converter = self.conversion.get_converter(self.mime)
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if converter:
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body = bytearray()
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# noinspection PyAssignmentToLoopOrWithParameter
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for line, lf in chain([(line, lf)], iter_lines):
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body.extend(line)
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body.extend(lf)
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self.mime, body = converter.convert(body)
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assert isinstance(body, str)
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yield self.process_body(body)
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return
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raise BinarySuppressedError()
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yield self.process_body(line) + lf
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first_chunk = False
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def process_body(self, chunk):
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if not isinstance(chunk, str):
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# Text when a converter has been used,
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# otherwise it will always be bytes.
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chunk = chunk.decode(self.msg.encoding, 'replace')
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chunk = self.formatting.format_body(content=chunk, mime=self.mime)
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return chunk.encode(self.output_encoding, 'replace')
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class BufferedPrettyStream(PrettyStream):
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"""The same as :class:`PrettyStream` except that the body is fully
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fetched before it's processed.
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Suitable regular HTTP responses.
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"""
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CHUNK_SIZE = 1024 * 10
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def iter_body(self):
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# Read the whole body before prettifying it,
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# but bail out immediately if the body is binary.
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converter = None
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body = bytearray()
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for chunk in self.msg.iter_body(self.CHUNK_SIZE):
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if not converter and b'\0' in chunk:
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converter = self.conversion.get_converter(self.mime)
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if not converter:
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raise BinarySuppressedError()
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body.extend(chunk)
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if converter:
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self.mime, body = converter.convert(body)
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yield self.process_body(body)
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