ByteScout Cloud API Server – Barcode Reader API – Python – Read Barcode From Uploaded File

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ByteScout Cloud API Server – Barcode Reader API – Python – Read Barcode From Uploaded File

printable version:
ByteScout-Cloud-API-Server-Python-Read-Barcode-From-Uploaded-File.pdf

How to read barcode from uploaded file for barcode reader API in Python using ByteScout Cloud API Server

How to read barcode from uploaded file in Python with easy ByteScout code samples to make barcode reader API. Step-by-step tutorial

Every ByteScout tool includes sample Python source codes that you can find here or in the folder with installed ByteScout product. ByteScout Cloud API Server was designed to assist barcode reader API in Python. ByteScout Cloud API Server is API server that is ready to use and can be installed and deployed in less than 30 minutes on your own Windows server or server in a cloud. It can save data and files on your local server-based file storage or in Amazon AWS S3 storage. Data is processed solely on the API server and is powered by ByteScout engine, no cloud services or Internet connection is required for data processing..

If you want to speed up the application’s code writing then Python code samples for Python developers help to implement using ByteScout Cloud API Server. Follow the tutorial and copy – paste code for Python into your project’s code editor. Enjoy writing a code with ready-to-use sample Python codes to add barcode reader API functions using ByteScout Cloud API Server in Python.

Trial version of ByteScout is available for free download from our website. This and other source code samples for Python and other programming languages are available.

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ReadBarcodeFromUploadedFile.py

      import os
import requests # pip install requests

# Please NOTE: In this sample we're assuming Cloud Api Server is hosted at "https://localhost". 
# If it's not then please replace this with with your hosting url.

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

# 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 URL for 'Barcode Reader' API request
    url = "{}/barcode/read/from/url?types={}&pages={}&url={}".format(
        BASE_URL,
        BarcodeTypes,
        Pages,
        uploadedFileUrl
    )

    # Execute request and get response as JSON
    response = requests.get(url, headers={ "content-type": "application/octet-stream" })
    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)
    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={  "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()