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Split PDF From Uploaded File | Java | PDF Splitting API
Main.java:
J#
package com.company; import com.google.gson.JsonArray; 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 final static String API_KEY = "***********************************"; // Source PDF file to split final static Path SourceFile = Paths.get(".\\sample.pdf"); // Comma-separated list of page numbers (or ranges) to process. Example: '1,3-5,7-'. final static String Pages = "1-2,3-"; 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, API_KEY, uploadUrl, SourceFile)) { // 3. SPLIT UPLOADED PDF SplitPdf(webClient, API_KEY, Pages, uploadedFileUrl); } } 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 SplitPdf(OkHttpClient webClient, String apiKey, String pages, String uploadedFileUrl) throws IOException { // Prepare URL for `Split PDF` API call String query = "https://api.pdf.co/v1/pdf/split"; // Make correctly escaped (encoded) URL URL url = null; try { url = new URI(null, query, null).toURL(); } catch (URISyntaxException e) { e.printStackTrace(); } // Create JSON payload String jsonPayload = String.format("{\"pages\": \"%s\", \"url\": \"%s\"}", pages, uploadedFileUrl); // Prepare request body RequestBody body = RequestBody.create(MediaType.parse("application/json"), jsonPayload); // Prepare request Request request = new Request.Builder() .url(url) .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) { // Download generated PDF files JsonArray urls = json.get("urls").getAsJsonArray(); int part = 1; for (JsonElement element: urls) { String resultFileUrl = element.getAsString(); String localFileName = String.format(".\\part%s.pdf", part); downloadFile(webClient, resultFileUrl, Paths.get(localFileName).toFile()); System.out.println(String.format("Splitted part saved as \"%s\".", localFileName)); part++; } } 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 apiKey, String url, Path sourceFile) throws IOException { // Prepare request body RequestBody body = RequestBody.create(MediaType.parse("application/octet-stream"), sourceFile.toFile()); // Prepare request Request request = new Request.Builder() .url(url) .addHeader("x-api-key", apiKey) // (!) Set API Key .addHeader("content-type", "application/octet-stream") .put(body) .build(); // Execute request Response response = webClient.newCall(request).execute(); return (response.code() == 200); } 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(); } }