python-rest-api/src/parser.py at master · witer33/python-rest-api · GitHub

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# Python Rest API - Pure-Python web server for Rest APIs.

# This file is part of Python Rest API.

# Python Rest API is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# Python Rest API is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License

# along with Python Rest API. If not, see <http://www.gnu.org/licenses/>.

from .types import HttpRequest

class Parser:

def __init__(self, request: str):

self.request = request

self.pos = 0

def advance(self):

self.pos += 1

if len(self.request) >= self.pos:

return self.request[self.pos - 1]

def parse(self):

char = self.advance()

line = 0

headers = {}

method_line = ""

header_name = ""

header_value = ""

in_value = False

in_content = False

content = ""

skip = False

while char:

if line != 0 and not in_content:

if char == "\r":

self.advance()

if header_name != "":

header_name = header_name.lower()

line += 1

in_value = False

headers[header_name] = header_value.strip()

header_value = ""

header_name = ""

else:

in_content = True

elif char == ":" and not in_value:

in_value = True

elif in_value:

header_value += char

else:

header_name += char

elif in_content:

content += char

elif char == "\r":

self.advance()

line += 1

else:

method_line += char

char = self.advance()

if header_name != "" and not in_content:

header_name = header_name.lower()

headers[header_name] = header_value.strip()

values = method_line.strip().split(" ", 2)

method, path, http_version = tuple(values)

params = path.split("?", 1)

if len(params) == 2:

path = params[0]

get_params = params[1]

get_params_parsed = {}

for param in get_params.split("&"):

name, value = tuple(param.split("="))

get_params_parsed[name] = value

else:

get_params_parsed = {}

http_version = float(http_version.split("/", 1)[1])

return HttpRequest(method, path, http_version, headers, content, get_params_parsed)

python-rest-api/src/parser.py at master · witer33/python-rest-api · GitHub

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