Get PDF with Puppeteer API on New Scheduled Tasks from Pipedream API

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New Scheduled Tasks from the Pipedream API

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Getting Started#

This integration creates a workflow with a Pipedream trigger and Puppeteer action. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

Select this integration
Configure the New Scheduled Tasks trigger
1. Connect your Pipedream account
2. Optional- Configure Secret
Configure the Get PDF action
1. Connect your Puppeteer account
2. Configure URL
3. Optional- Configure Download Path
4. Optional- Configure Display Header Footer
5. Optional- Configure Footer Template
6. Optional- Select a Format
7. Optional- Configure Header Template
8. Optional- Configure Height
9. Optional- Configure Landscape
10. Optional- Configure Bottom Margin
11. Optional- Configure Left Margin
12. Optional- Configure Right Margin
13. Optional- Configure Top Margin
14. Optional- Configure Omit Background
15. Optional- Configure Page Ranges
16. Optional- Configure Prefer CSS Page Size
17. Optional- Configure Print Background
18. Optional- Configure Scale
19. Optional- Configure Timeout
20. Optional- Configure Width
Deploy the workflow
Send a test event to validate your setup
Turn on the trigger

Details#

This integration uses pre-built, source-available components from Pipedream's GitHub repo. These components are developed by Pipedream and the community, and verified and maintained by Pipedream.

To contribute an update to an existing component or create a new component, create a PR on GitHub. If you're new to Pipedream component development, you can start with quickstarts for trigger span and action development, and then review the component API reference.

Trigger#

New Scheduled Tasks on Pipedream

Description:Exposes an HTTP API for scheduling messages to be emitted at a future time

Version:0.3.1

Key:pipedream-new-scheduled-tasks

View on GitHub

Pipedream Overview#

Pipedream is an API that allows you to build applications that can connect to
various data sources and processes them in real-time. You can use Pipedream to
create applications that can perform ETL (Extract, Transform, and Load) tasks,
as well as to create data-driven workflows.

Some examples of applications you can build using the Pipedream API include:

An application that can extract data from a database, transform it, and then
load it into another database.
An application that can monitor a data source for changes, and then trigger a
workflow in response to those changes.
An application that can poll an API for new data, and then process that data
in real-time.

Trigger Code#

import pipedream from "../../pipedream.app.mjs";
import sampleEmit from "./test-event.mjs";
import { uuid } from "uuidv4";

export default {
  key: "pipedream-new-scheduled-tasks",
  name: "New Scheduled Tasks",
  type: "source",
  description:
    "Exposes an HTTP API for scheduling messages to be emitted at a future time",
  version: "0.3.1",
  dedupe: "unique", // Dedupe on a UUID generated for every scheduled task
  props: {
    pipedream,
    secret: {
      type: "string",
      secret: true,
      label: "Secret",
      optional: true,
      description:
        "**Optional but recommended**: if you enter a secret here, you must pass this value in the `x-pd-secret` HTTP header when making requests",
    },
    http: {
      label: "Endpoint",
      description: "The endpoint where you'll send task scheduler requests",
      type: "$.interface.http",
      customResponse: true,
    },
    db: "$.service.db",
  },
  methods: {
    // To schedule future emits, we emit to the selfChannel of the component
    selfChannel() {
      return "self";
    },
    // Queue for future emits that haven't yet been delivered
    queuedEventsChannel() {
      return "$in";
    },
    httpRespond({
      status, body,
    }) {
      this.http.respond({
        headers: {
          "content-type": "application/json",
        },
        status,
        body,
      });
    },
    async selfSubscribe() {
      // Subscribe the component to itself. We do this here because even in
      // the activate hook, the component isn't available to take subscriptions.
      // Scheduled tasks are sent to the self channel, which emits the message at
      // the specified delivery_ts to this component.
      const isSubscribedToSelf = this.db.get("isSubscribedToSelf");
      if (!isSubscribedToSelf) {
        const componentId = process.env.PD_COMPONENT;
        const selfChannel = this.selfChannel();
        console.log(`Subscribing to ${selfChannel} channel for event source`);
        console.log(
          await this.pipedream.subscribe(componentId, componentId, selfChannel),
        );
        this.db.set("isSubscribedToSelf", true);
      }
    },
    validateEventBody(event, operation) {
      const errors = [];

      // Secrets are optional, so we first check if the user configured
      // a secret, then check its value against the prop (validation below)
      if (this.secret && event.headers["x-pd-secret"] !== this.secret) {
        errors.push(
          "Secret on incoming request doesn't match the configured secret",
        );
      }

      if (operation === "schedule") {
        const {
          timestamp,
          message,
        } = event.body;
        // timestamp should be an ISO 8601 string. Parse and check for validity below.
        const epoch = Date.parse(timestamp);

        if (!timestamp) {
          errors.push(
            "No timestamp included in payload. Please provide an ISO8601 timestamp in the 'timestamp' field",
          );
        }
        if (timestamp && !epoch) {
          errors.push("Timestamp isn't a valid ISO 8601 string");
        }
        if (!message) {
          errors.push("No message passed in payload");
        }
      }

      return errors;
    },
    scheduleTask(event) {
      const errors = this.validateEventBody(event, "schedule");
      let status, body;

      if (errors.length) {
        console.log(errors);
        status = 400;
        body = {
          errors,
        };
      } else {
        const id = this.emitScheduleEvent(event.body, event.body.timestamp);
        status = 200;
        body = {
          msg: "Successfully scheduled task",
          id,
        };
      }

      this.httpRespond({
        status,
        body,
      });
    },
    emitScheduleEvent(event, timestamp) {
      const selfChannel = this.selfChannel();
      const epoch = Date.parse(timestamp);
      const $id = uuid();

      console.log(`Scheduled event to emit on: ${new Date(epoch)}`);

      this.$emit(
        {
          ...event,
          $channel: selfChannel,
          $id,
        },
        {
          name: selfChannel,
          id: $id,
          delivery_ts: epoch,
        },
      );

      return $id;
    },
    async cancelTask(event) {
      const errors = this.validateEventBody(event, "cancel");
      let status, msg;

      if (errors.length) {
        console.log(errors);
        status = 400;
        msg = "Secret on incoming request doesn't match the configured secret";
      } else {
        try {
          const id = event.body.id;
          const isCanceled = await this.deleteEvent(event);
          if (isCanceled) {
            status = 200;
            msg = `Cancelled scheduled task for event ${id}`;
          } else {
            status = 404;
            msg = `No event with ${id} found`;
          }
        } catch (error) {
          console.log(error);
          status = 500;
          msg = "Failed to schedule task. Please see the logs";
        }
      }

      this.httpRespond({
        status,
        body: {
          msg,
        },
      });
    },
    async deleteEvent(event) {
      const componentId = process.env.PD_COMPONENT;
      const inChannel = this.queuedEventsChannel();

      // The user must pass a scheduled event UUID they'd like to cancel
      // We lookup the event by ID and delete it
      const { id } = event.body;

      // List events in the $in channel - the queue of scheduled events, to be emitted in the future
      const events = await this.pipedream.listEvents(
        componentId,
        inChannel,
      );
      console.log("Events: ", events);

      // Find the event in the list by id
      const eventToCancel = events.data.find((e) => {
        const { metadata } = e;
        return metadata.id === id;
      });

      console.log("Event to cancel: ", eventToCancel);

      if (!eventToCancel) {
        console.log(`No event with ${id} found`);
        return false;
      }

      // Delete the event
      await this.pipedream.deleteEvent(
        componentId,
        eventToCancel.id,
        inChannel,
      );
      return true;
    },
    emitEvent(event, summary) {
      // Delete the channel name and id from the incoming event, which were used only as metadata
      const id = event.$id;
      delete event.$channel;
      delete event.$id;

      this.$emit(event, {
        summary: summary ?? JSON.stringify(event),
        id,
        ts: +new Date(),
      });
    },
  },
  async run(event) {
    await this.selfSubscribe();

    const { path } = event;
    if (path === "/schedule") {
      this.scheduleTask(event);
    } else if (path === "/cancel") {
      await this.cancelTask(event);
    } else if (event.$channel === this.selfChannel()) {
      this.emitEvent(event);
    }
  },
  sampleEmit,
};

Trigger Configuration#

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI and CLI.

Label	Prop	Type	Description
Pipedream	`pipedream`	`app`	This component uses the Pipedream app.
Secret	`secret`	`string`	Optional but recommended: if you enter a secret here, you must pass this value in the `x-pd-secret` HTTP header when making requests
N/A	`http`	`$.interface.http`	This component uses `$.interface.http` to generate a unique URL when the component is first instantiated. Each request to the URL will trigger the `run()` method of the component.
N/A	`db`	`$.service.db`	This component uses `$.service.db` to maintain state between executions.

Trigger Authentication#

Pipedream uses API keys for authentication. When you connect your Pipedream account, Pipedream securely stores the keys so you can easily authenticate to Pipedream APIs in both code and no-code steps.

About Pipedream#

Integration platform for developers

Action#

Get PDF on Puppeteer

Description:Generate a PDF of a page using Puppeteer. [See the documentation](https://pptr.dev/api/puppeteer.page.pdf)

Version:1.0.1

Key:puppeteer-get-pdf

View on GitHub

Puppeteer Overview#

Puppeteer is a Node.js library which provides a high-level API to control Chrome/Chromium over the DevTools Protocol. Puppeteer runs in headless mode on Chromium on Pipedream.

Using Puppeteer you can perform tasks including:

Capture Screenshots: Convert webpages into images.
Processing PDFs: parse and scan PDFs.
Web Scraping: Extract data from websites.
UI/UX Testing: Verify user interface and experience.
Integration with Test Frameworks: Combine with testing frameworks.
Task Automation: Automate web-related tasks like form filling.
Functional Testing: Automate user interactions to test web application functionality.
Regression Testing: Ensure new code changes don't introduce bugs.

Action Code#

import puppeteer from "../../puppeteer.app.mjs";
import constants from "../../common/constants.mjs";
import fs from "fs";

export default {
  key: "puppeteer-get-pdf",
  name: "Get PDF",
  description: "Generate a PDF of a page using Puppeteer. [See the documentation](https://pptr.dev/api/puppeteer.page.pdf)",
  version: "1.0.1",
  type: "action",
  props: {
    puppeteer,
    url: {
      type: "string",
      label: "URL",
      description: "The URL of the page to scrape.",
    },
    downloadPath: {
      type: "string",
      label: "Download Path",
      description: "Download the PDF to the `/tmp` directory with the specified filename",
      optional: true,
    },
    displayHeaderFooter: {
      type: "boolean",
      label: "Display Header Footer",
      description: "Whether to show the header and footer.",
      optional: true,
      default: false,
    },
    footerTemplate: {
      type: "string",
      label: "Footer Template",
      description: "HTML template for the print footer.",
      optional: true,
    },
    format: {
      type: "string",
      label: "Format",
      description: "The paper format of the PDF",
      options: constants.PAPER_FORMAT,
      optional: true,
    },
    headerTemplate: {
      type: "string",
      label: "Header Template",
      description: "HTML template for the print header. Should be valid HTML with the following classes used to inject values into them: `date` - formatted print date, `title` - document title, `url` - document location, `pageNumber` - current page number, `totalPages` - total pages in the document.",
      optional: true,
    },
    height: {
      type: "string",
      label: "Height",
      description: "Sets the height of paper. You can pass in a number or a string with a unit.",
      optional: true,
    },
    landscape: {
      type: "boolean",
      label: "Landscape",
      description: "Whether to print in landscape orientation.",
      optional: true,
      default: false,
    },
    marginBottom: {
      type: "string",
      label: "Bottom Margin",
      description: "Margin for the bottom of the page",
      optional: true,
    },
    marginLeft: {
      type: "string",
      label: "Left Margin",
      description: "Margin for the left side of the page",
      optional: true,
    },
    marginRight: {
      type: "string",
      label: "Right Margin",
      description: "Margin for the right side of the page",
      optional: true,
    },
    marginTop: {
      type: "string",
      label: "Top Margin",
      description: "Margin for the top of the page",
      optional: true,
    },
    omitBackground: {
      type: "boolean",
      label: "Omit Background",
      description: "Hides default white background and allows generating pdfs with transparency.",
      optional: true,
      default: false,
    },
    pageRanges: {
      type: "string",
      label: "Page Ranges",
      description: "Paper ranges to print, e.g. 1-5, 8, 11-13.",
      optional: true,
    },
    preferCSSPageSize: {
      type: "boolean",
      label: "Prefer CSS Page Size",
      description: "Give any CSS @page size declared in the page priority over what is declared in the width or height or format option.",
      optional: true,
      default: false,
    },
    printBackground: {
      type: "boolean",
      label: "Print Background",
      description: "Set to true to print background graphics.",
      optional: true,
      default: false,
    },
    scale: {
      type: "string",
      label: "Scale",
      description: "Scales the rendering of the web page. Amount must be between 0.1 and 2.",
      optional: true,
    },
    timeout: {
      type: "integer",
      label: "Timeout",
      description: "Timeout in milliseconds. Pass 0 to disable timeout.",
      optional: true,
      default: 30000,
    },
    width: {
      type: "string",
      label: "Width",
      description: "Sets the width of paper. You can pass in a number or a string with a unit.",
      optional: true,
    },
  },
  methods: {
    async downloadToTMP(pdf) {
      const path = this.downloadPath.includes("/tmp")
        ? this.downloadPath
        : `/tmp/${this.downloadPath}`;
      fs.writeFileSync(path, pdf);
      return path;
    },
  },
  async run({ $ }) {
    const options = {
      displayHeaderFooter: this.displayHeaderFooter,
      footerTemplate: this.footerTemplate,
      format: this.format,
      headerTemplate: this.headerTemplate,
      height: this.height,
      landscape: this.landscape,
      margin: {
        bottom: this.marginBottom,
        left: this.marginLeft,
        right: this.marginRight,
        top: this.marginTop,
      },
      omitBackground: this.omitBackground,
      pageRanges: this.pageRanges,
      preferCSSPageSize: this.preferCSSPageSize,
      printBackground: this.printBackground,
      scale: this.scale
        ? parseFloat(this.scale)
        : undefined,
      timeout: this.timeout,
      width: this.width,
    };

    const browser = await this.puppeteer.launch();
    const page = await browser.newPage();
    await page.goto(this.url);
    const pdf = await page.pdf(options);
    await browser.close();

    const filePath = pdf && this.downloadPath
      ? await this.downloadToTMP(pdf)
      : undefined;

    if (pdf) {
      $.export("$summary", "Successfully generated PDF from page.");
    }

    return filePath
      ? {
        pdf,
        filePath,
      }
      : pdf;
  },
};

Action Configuration#

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI.

Label	Prop	Type	Description
Puppeteer	`puppeteer`	`app`	This component uses the Puppeteer app.
URL	`url`	`string`	The URL of the page to scrape.
Download Path	`downloadPath`	`string`	Download the PDF to the `/tmp` directory with the specified filename
Display Header Footer	`displayHeaderFooter`	`boolean`	Whether to show the header and footer.
Footer Template	`footerTemplate`	`string`	HTML template for the print footer.
Format	`format`	`string`	Select a value from the drop down menu:`{ "value": "letter", "label": "Letter - 8.5in x 11in" }{ "value": "legal", "label": "Legal - 8.5in x 14in" }{ "value": "tabloid", "label": "Tabloid - 11in x 17in" }{ "value": "ledger", "label": "Ledger - 17in x 11in" }{ "value": "a0", "label": "A0 - 33.1in x 46.8in" }{ "value": "a1", "label": "A1 - 23.4in x 33.1in" }{ "value": "a2", "label": "A2 - 16.54in x 23.4in" }{ "value": "a3", "label": "A3 - 11.7in x 16.54in" }{ "value": "a4", "label": "A4 - 8.27in x 11.7in" }{ "value": "a5", "label": "A5 - 5.83in x 8.27in" }{ "value": "a6", "label": "A6 - 4.13in x 5.83in" }`
Header Template	`headerTemplate`	`string`	HTML template for the print header. Should be valid HTML with the following classes used to inject values into them: `date` - formatted print date, `title` - document title, `url` - document location, `pageNumber` - current page number, `totalPages` - total pages in the document.
Height	`height`	`string`	Sets the height of paper. You can pass in a number or a string with a unit.
Landscape	`landscape`	`boolean`	Whether to print in landscape orientation.
Bottom Margin	`marginBottom`	`string`	Margin for the bottom of the page
Left Margin	`marginLeft`	`string`	Margin for the left side of the page
Right Margin	`marginRight`	`string`	Margin for the right side of the page
Top Margin	`marginTop`	`string`	Margin for the top of the page
Omit Background	`omitBackground`	`boolean`	Hides default white background and allows generating pdfs with transparency.
Page Ranges	`pageRanges`	`string`	Paper ranges to print, e.g. 1-5, 8, 11-13.
Prefer CSS Page Size	`preferCSSPageSize`	`boolean`	Give any CSS @page size declared in the page priority over what is declared in the width or height or format option.
Print Background	`printBackground`	`boolean`	Set to true to print background graphics.
Scale	`scale`	`string`	Scales the rendering of the web page. Amount must be between 0.1 and 2.
Timeout	`timeout`	`integer`	Timeout in milliseconds. Pass 0 to disable timeout.
Width	`width`	`string`	Sets the width of paper. You can pass in a number or a string with a unit.

Action Authentication#

The Puppeteer API does not require authentication.

About Puppeteer#

Puppeteer is a Node.js library which provides a high-level API to control Chrome/Chromium over the DevTools Protocol.

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Popular Triggers#

New Scheduled Tasks from the Pipedream API

Exposes an HTTP API for scheduling messages to be emitted at a future time

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New Upcoming Event Alert from the Pipedream API

Emit new event based on a time interval before an upcoming event in the calendar. This source uses Pipedream's Task Scheduler. See the documentation for more information and instructions for connecting your Pipedream account.

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New Upcoming Calendar Event from the Pipedream API

Emit new event when a Calendar event is upcoming, this source is using reminderMinutesBeforeStart property of the event to determine the time it should emit.

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New Upcoming Event Type Alert from the Pipedream API

Emit new event based on a time interval before an upcoming event of the specified type ("default", "focusTime", "outOfOffice", "workingLocation") in the calendar. This source uses Pipedream's Task Scheduler. See the documentation for more information and instructions for connecting your Pipedream account.

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