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Custom headers for reading pdf files #96

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Custom headers for reading pdf files #96

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a59a8d3
Support custom headers
CodMonk Jul 12, 2024
a2d329a
Update file_reader.py
CodMonk Jul 12, 2024
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14 changes: 9 additions & 5 deletions llmsherpa/readers/file_reader.py
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Original file line number Diff line number Diff line change
Expand Up @@ -27,12 +27,14 @@ def __init__(self, parser_api_url):
self.download_connection = urllib3.PoolManager()
self.api_connection = urllib3.PoolManager()

def _download_pdf(self, pdf_url):

# some servers only allow browers user_agent to download
def _download_pdf(self, pdf_url, headers=None):
# some servers only allow browsers user_agent to download
user_agent = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36"
# add authorization headers if using external API (see upload_pdf for an example)
download_headers = {"User-Agent": user_agent}
# update headers with custom headers if provided
if headers:
download_headers.update(headers)
download_response = self.download_connection.request("GET", pdf_url, headers=download_headers)
file_name = os.path.basename(urlparse(pdf_url).path)
# note you can change the file name here if you'd like to something else
Expand All @@ -45,7 +47,7 @@ def _parse_pdf(self, pdf_file):
parser_response = self.api_connection.request("POST", self.parser_api_url, fields={'file': pdf_file})
return parser_response

def read_pdf(self, path_or_url, contents=None):
def read_pdf(self, path_or_url, contents=None, headers=None):
"""
Reads pdf from a url or path

Expand All @@ -55,14 +57,16 @@ def read_pdf(self, path_or_url, contents=None):
path or url to the pdf file e.g. https://someexapmple.com/myfile.pdf or /home/user/myfile.pdf
contents: bytes
contents of the pdf file. If contents is given, path_or_url is ignored. This is useful when you already have the pdf file contents in memory such as if you are using streamlit or flask.
headers: dict
custom headers to use when downloading the PDF from a URL.
"""
# file contents were given
if contents is not None:
pdf_file = (path_or_url, contents, 'application/pdf')
else:
is_url = urlparse(path_or_url).scheme != ""
if is_url:
pdf_file = self._download_pdf(path_or_url)
pdf_file = self._download_pdf(path_or_url, headers)
else:
file_name = os.path.basename(path_or_url)
with open(path_or_url, "rb") as f:
Expand Down