Parse From Url - Java
Document Parser sample in Java demonstrating ‘Parse From Url’
MultiPageTable-template1.yml
templateName: Multipage Table Test
templateVersion: 4
templatePriority: 0
detectionRules:
keywords:
- Sample document with multi-page table
objects:
- name: total
objectType: field
fieldProperties:
fieldType: macros
expression: TOTAL{{Spaces}}({{Number}})
regex: true
dataType: decimal
- name: table1
objectType: table
tableProperties:
start:
expression: Item{{Spaces}}Description{{Spaces}}Price
regex: true
end:
expression: TOTAL{{Spaces}}{{Number}}
regex: true
row:
expression: '{{LineStart}}{{Spaces}}(?<itemNo>{{Digits}}){{Spaces}}(?<description>{{SentenceWithSingleSpaces}}){{Spaces}}(?<price>{{Number}}){{Spaces}}(?<qty>{{Digits}}){{Spaces}}(?<extPrice>{{Number}})'
regex: true
columns:
- name: itemNo
dataType: integer
- name: description
dataType: string
- name: price
dataType: decimal
- name: qty
dataType: integer
- name: extPrice
dataType: decimal
multipage: true
Main.java
package com.company;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.JsonPrimitive;
import okhttp3.*;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
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
final static String API_KEY = "***********************************";
public static void main(String[] args) throws IOException {
// Source PDF file
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/bytescout/pdf-co-api-samples/tree/master/File%20Upload/
final String SourceFileUrl = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/document-parser/MultiPageTable.pdf";
// PDF document password. Leave empty for unprotected documents.
final String Password = "";
// Destination JSON file name
final Path DestinationFile = Paths.get(".\\result.json");
// Template text. Use Document Parser (https://pdf.co/document-parser, https://app.pdf.co/document-parser)
// to create templates.
// Read template from file:
String templateText = new String(Files.readAllBytes(Paths.get(".\\MultiPageTable-template1.yml")), StandardCharsets.UTF_8);
// Create HTTP client instance
OkHttpClient webClient = new OkHttpClient();
// PARSE UPLOADED PDF DOCUMENT
ParseDocument(webClient, API_KEY, DestinationFile, Password, SourceFileUrl, templateText);
}
public static void ParseDocument(OkHttpClient webClient, String apiKey, Path destinationFile,
String password, String uploadedFileUrl, String templateText) throws IOException {
// Prepare POST request body in JSON format
JsonObject jsonBody = new JsonObject();
jsonBody.add("url", new JsonPrimitive(uploadedFileUrl));
jsonBody.add("template", new JsonPrimitive(templateText));
RequestBody body = RequestBody.create(MediaType.parse("application/json"), jsonBody.toString());
// Prepare request to `Document Parser` API
Request request = new Request.Builder()
.url("https://api.pdf.co/v1/pdf/documentparser")
.addHeader("x-api-key", API_KEY) // (!) Set API Key
.addHeader("Content-Type", "application/json")
.post(body)
.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 of generated JSON file
String resultFileUrl = json.get("url").getAsString();
// Download JSON file
downloadFile(webClient, resultFileUrl, destinationFile.toFile());
System.out.printf("Generated JSON file saved as \"%s\" file.", destinationFile.toString());
} 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 downloadFile(OkHttpClient webClient, String url, File destinationFile) throws IOException {
// Prepare request
Request request = new Request.Builder()
.url(url)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
byte[] fileBytes = response.body().bytes();
// Save downloaded bytes to file
OutputStream output = new FileOutputStream(destinationFile);
output.write(fileBytes);
output.flush();
output.close();
response.close();
}
}
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