How can I insert my URL into the webPDFLoader feature of LangChain platform?

I need help figuring out how to load a PDF from a URL using the webPDFLoader. Can someone explain how to implement this? Any assistance would be greatly appreciated.

I am working on this task in nextjs. Where should I place the pdfUrl variable within the webPDFLoader section?

"use client";
import React, { useEffect } from "react";
import { WebPDFLoader } from "langchain/document_loaders/web/pdf";
import { guestPdfId } from "@/components/Hero";
import { Document } from "react-pdf";

const bucketId = process.env.NEXT_PUBLIC_APPWRITE_BUCKET_ID!;
const fileId = guestPdfId;
const projectId = process.env.NEXT_PUBLIC_APPWRITE_PROJECT_ID!;

const pdfUrl = `https://cloud.appwrite.io/v1/storage/buckets/${bucketId}/files/${fileId}/view?project=${projectId}&mode=admin`;

// webPDFLoader
const blob = new Blob(); // e.g. from a file input

const loader = new WebPDFLoader(blob, {
  // you may need to add `.then(m => m.default)` to the end of the import
  pdfjs: () => import("pdfjs-dist/legacy/build/pdf.js"),
});

docs = loader.load()

const docLen = docs.length()

const ProcessPdf = () => {

  return <div>
    <button onClick={doclen}>Show PDF</button>
</div>;
};

export default ProcessPdf;

Answer №1

This code snippet showcases the process of loading a PDF file:

async function loadPDF(url: string | URL | Request) {
const response = await fetch(url);
const data = await response.blob();
const loader = new WebPDFLoader(data);
const docs = await loader.load();
console.log({ docs });
return docs;

}

The primary objective is to retrieve the PDF from the specified URL using the fetch method, then convert it into a blob, and ultimately provide this blob to WebPDFLoader for further processing.

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