PDF.co Web API - Barcode Reader API - Java - Read Barcode From Uploaded File - ByteScout

PDF.co Web API – Barcode Reader API – Java – Read Barcode From Uploaded File

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PDF.co Web API – Barcode Reader API – Java – Read Barcode From Uploaded File

Main.java

[java]
package com.company;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import okhttp3.*;

import java.io.*;
import java.net.*;
import java.nio.file.Path;
import java.nio.file.Paths;

public class Main
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co/documentation/api
final static String API_KEY = “***********************************”;

// Source file name
final static Path SourceFile = Paths.get(“.\\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
final static String 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-‘.
final static String Pages = “”;

public static void main(String[] args) throws IOException
{
// Create HTTP client instance
OkHttpClient webClient = new OkHttpClient();

// 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE.
// * If you already have a direct file URL, skip to the step 3.

// Prepare URL for `Get Presigned URL` API call
String query = String.format(
“https://api.pdf.co/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name=%s”,
SourceFile.getFileName());

// Prepare request
Request request = new Request.Builder()
.url(query)
.addHeader(“x-api-key”, API_KEY) // (!) Set API Key
.build();
// Execute request
Response response = webClient.newCall(request).execute();

if (response.code() == 200)
{
// Parse JSON response
JsonObject json = new JsonParser().parse(response.body().string()).getAsJsonObject();

boolean error = json.get(“error”).getAsBoolean();
if (!error)
{
// Get URL to use for the file upload
String uploadUrl = json.get(“presignedUrl”).getAsString();
// Get URL of uploaded file to use with later API calls
String uploadedFileUrl = json.get(“url”).getAsString();

// 2. UPLOAD THE FILE TO CLOUD.

if (uploadFile(webClient, uploadUrl, SourceFile.toFile()))
{
// 3. READ BARCODES FROM UPLOADED FILE

readBarcodes(webClient, uploadedFileUrl, BarcodeTypes, Pages);
}
}
else
{
// Display service reported error
System.out.println(json.get(“message”).getAsString());
}
}
else
{
// Display request error
System.out.println(response.code() + ” ” + response.message());
}
}

public static void readBarcodes(OkHttpClient webClient, String uploadedFileUrl, String barcodeTypes, String pages) throws IOException {
// Prepare URL for `Barcode Reader` API call
String query = String.format(
“https://api.pdf.co/v1/barcode/read/from/url?types=%s&pages=%s&url=%s”,
barcodeTypes,
pages,
uploadedFileUrl);

// Make correctly escaped (encoded) URL
URL url = null;
try
{
url = new URI(null, query, null).toURL();
}
catch (URISyntaxException e)
{
e.printStackTrace();
}

// Prepare request
Request request = new Request.Builder()
.url(url)
.addHeader(“x-api-key”, API_KEY) // (!) Set API Key
.build();

// Execute request
Response response = webClient.newCall(request).execute();

if (response.code() == 200)
{
// Parse JSON response
JsonObject json = new JsonParser().parse(response.body().string()).getAsJsonObject();

boolean error = json.get(“error”).getAsBoolean();
if (!error)
{
// Display found barcodes in console
for (JsonElement element : json.get(“barcodes”).getAsJsonArray())
{
JsonObject barcode = (JsonObject) element;
System.out.println(“Found barcode:”);
System.out.println(” Type: ” + barcode.get(“TypeName”).getAsString());
System.out.println(” Value: ” + barcode.get(“Value”).getAsString());
System.out.println(” Document Page Index: ” + barcode.get(“Page”).getAsString());
System.out.println(” Rectangle: ” + barcode.get(“Rect”).getAsString());
System.out.println(” Confidence: ” + barcode.get(“Confidence”).getAsString());
System.out.println();
}
}
else
{
// Display service reported error
System.out.println(json.get(“message”).getAsString());
}
}
else
{
// Display request error
System.out.println(response.code() + ” ” + response.message());
}
}

public static boolean uploadFile(OkHttpClient webClient, String url, File sourceFile) throws IOException
{
// Prepare request body
RequestBody body = RequestBody.create(MediaType.parse(“application/octet-stream”), sourceFile);

// Prepare request
Request request = new Request.Builder()
.url(url)
.addHeader(“x-api-key”, API_KEY) // (!) Set API Key
.addHeader(“content-type”, “application/octet-stream”)
.put(body)
.build();

// Execute request
Response response = webClient.newCall(request).execute();

return (response.code() == 200);
}
}

[/java]


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