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A generic request and response interface for pyexcel web extensions.

Project description

https://api.travis-ci.org/chfw/pyexcel-webio.png?branch=v0.0.1 https://coveralls.io/repos/chfw/pyexcel-webio/badge.png?branch=v0.0.1

pyexcel-webio is a tiny interface library to unify the web extensions that uses pyexcel . You may use it to write a web extension for your faviourite Python web framework.

Installation

You can install it via pip:

$ pip install pyexcel-webio

or clone it and install it:

$ git clone http://github.com/chfw/pyexcel-webio.git
$ cd pyexcel-webio
$ python setup.py install

Usage

This small section outlines the steps to adapt pyexcel-webio for your favourite web framework. For illustration purpose, I took Flask micro-framework as an example.

  1. Inherit ExcelInput class and implement load_single_sheet and load_book methods depending on the parameters you will have. For example, Flask.Request put the incoming file in Flask.Request.files and the key is the field name in the html form:

    from flask import Flask, Request
    import pyexcel as pe
    from pyexcel.ext import webio
    
    class ExcelRequest(webio.ExcelInput, Request):
        def _get_file_tuple(self, field_name):
            filehandle = self.files[field_name]
            filename = filehandle.filename
            extension = filename.split(".")[1]
            return extension, filehandle
    
        def load_single_sheet(self, field_name=None, sheet_name=None,
                              **keywords):
            file_type, file_handle = self._get_file_tuple(field_name)
            return pe.get_sheet(file_type=file_type,
                                content=file_handle.read(),
                                sheet_name=sheet_name,
                                **keywords)
    
        def load_book(self, field_name=None, **keywords):
            file_type, file_handle = self._get_file_tuple(field_name)
            return pe.get_book(file_type=file_type,
                               content=file_handle.read(),
                               **keywords)
  2. Plugin in a response method that has the following signature:

    def your_func(content, content_type=None, status=200):
        ....

    or a response class has the same signature:

    class YourClass:
        def __init__(self, content, content_type=None, status=200):
        ....

    For example, with Flask, it is just a few lines:

    from flask import Response
    
    
    webio.ExcelResponse = Response
  3. Then make the proxy for make_response series by simply copying the following lines to your extension:

    from pyexcel.ext.webio import (
        make_response,
        make_response_from_array,
        make_response_from_dict,
        make_response_from_records,
        make_response_from_book_dict
    )

Dependencies

  • pyexcel

Project details


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