How to Read Barcode from Uploaded File for Barcode Reader API in Python using PDF.co Web API

Step By Step Instructions on How to Read Barcode from Uploaded File for Barcode Reader API in Python

Writing of the code to read barcodes from the uploaded files in Python can be done by developers of any level using PDF.co Web API. Barcode reader API in Python can be applied with PDF.co Web API. PDF.co Web API is the Rest API that provides a set of data extraction functions, and tools for document manipulation, splitting, and merging of PDF files. Includes built-in OCR, and image recognition, and can generate and read barcodes from images, scans, and PDF.

If you want to speed up the application’s code writing then Python code samples for Python developers help to implement using PDF.co Web API. For the implementation of this functionality, please copy and paste the code below into your app using the code editor. Then compile and run your app. You can use these Python sample examples in one or many applications.

PDF.co Web API – free trial version is available on our website. Also, there are other code samples to help you with your Python application included in trial version.

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ReadBarcodeFromUploadedFile.py

      
import os
import requests # pip install requests

# The authentication key (API Key).
# Get your own by registering at https://app.pdf.co/documentation/api
API_KEY = "*************************************"

# Base URL for PDF.co Web API requests
BASE_URL = "https://api.pdf.co/v1"

# Source file name
SourceFile = ".\\sample.pdf"

# Comma-separated list of barcode types to search.
# See valid barcode types in the documentation https://app.pdf.co/documentation/api/1.0/barcode/read_from_url.html
BarcodeTypes = "Code128,Code39,Interleaved2of5,EAN13"

# Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
Pages = ""

def main(args = None):
    uploadedFileUrl = uploadFile(SourceFile)
    if (uploadedFileUrl != None):
        readBarcodes(uploadedFileUrl)


def readBarcodes(uploadedFileUrl):
    """Get Barcode Information using PDF.co Web API"""

    # Prepare requests params as JSON
    # See documentation: https://apidocs.pdf.co
    parameters = {}
    parameters["types"] = BarcodeTypes
    parameters["pages"] = Pages
    parameters["url"] = uploadedFileUrl

    # Prepare URL for 'Barcode Reader' API request
    url = "{}/barcode/read/from/url".format(BASE_URL)

    # Execute request and get response as JSON
    response = requests.post(url, data=parameters, headers={ "x-api-key": API_KEY })
    if (response.status_code == 200):
        json = response.json()

        if json["error"] == False:
            # Display information
            for barcode in json["barcodes"]:
                print("Found barcode:")
                print(f"  Type: {barcode['TypeName']}")
                print(f"  Value: {barcode['Value']}")
                print(f"  Document Page Index: {barcode['Page']}")
                print(f"  Rectangle: {barcode['Rect']}")
                print(f"  Confidence: {barcode['Confidence']}")
                print("")
        else:
            # Show service reported error
            print(json["message"])
    else:
        print(f"Request error: {response.status_code} {response.reason}")


def uploadFile(fileName):
    """Uploads file to the cloud"""
    
    # 1. RETRIEVE PRESIGNED URL TO UPLOAD FILE.

    # Prepare URL for 'Get Presigned URL' API request
    url = "{}/file/upload/get-presigned-url?contenttype=application/octet-stream&name={}".format(
        BASE_URL, os.path.basename(fileName))
    
    # Execute request and get response as JSON
    response = requests.get(url, headers={ "x-api-key": API_KEY })
    if (response.status_code == 200):
        json = response.json()
        
        if json["error"] == False:
            # URL to use for file upload
            uploadUrl = json["presignedUrl"]
            # URL for future reference
            uploadedFileUrl = json["url"]

            # 2. UPLOAD FILE TO CLOUD.
            with open(fileName, 'rb') as file:
                requests.put(uploadUrl, data=file, headers={ "x-api-key": API_KEY, "content-type": "application/octet-stream" })

            return uploadedFileUrl
        else:
            # Show service reported error
            print(json["message"])    
    else:
        print(f"Request error: {response.status_code} {response.reason}")

    return None


if __name__ == '__main__':
    main()

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