This topic was automatically generated from Slack. You can find the original thread here.
how would i download a file from /tmp and return a binary?
To download a file from the /tmp directory and return its binary content in a Pipedream Node.js code step, you can use the fs module to read the file and return the buffer. Here’s an example of how you might do this: import fs from "fs/promises"; export default defineComponent({ async run({ steps, $ }) { // Replace 'filename.ext' with your actual file name const filePath = `/tmp/filename.ext`; // Read the file as a buffer const fileBuffer = await fs.readFile(filePath); // Return the binary content return fileBuffer; }, }); This code reads the file from the /tmp directory as a buffer and returns it. The buffer contains the binary data of the file, which can then be used as needed within your workflow or returned as an HTTP response if your workflow is set up as an API endpoint.
how would you update this so that it works with pipeline streams?
To update the provided Slack component to work with Pipedream’s Pipeline Streams, you would need to make use of the $send function to send data to a stream. However, since the provided snippet does not include any specific details about how you want to interact with Pipeline Streams, I’ll provide a generic example of how you could modify the component to send the response from the Slack API to a stream. Here’s an example of how you might modify the component: import { axios } from "@pipedream/platform"; export default defineComponent({ props: { slack: { type: "app", app: "slack", }, // Assuming you have a stream ID to send data to streamId: { type: "string", label: "Stream ID", description: "The ID of the stream you want to send data to", }, }, async run({ steps, $ }) { // Make the API request to Slack const response = await axios($, { url: `https://slack.com/api/users.profile.get`, headers: { Authorization: `Bearer ${this.slack.$auth.oauth_access_token}`, }, }); // Send the response data to the specified stream await $send({ id: this.streamId, // Use the stream ID from the component props data: response, // Send the full response from the Slack API }); // Optionally return the response data return response; }, }); In this example, I’ve added a new prop called streamId to allow the user to specify the ID of the stream they want to send data to. The $send function is then used to send the response data from the Slack API to the specified stream. Please note that you will need to replace streamId with the actual ID of the stream you want to use. If you need further customization or have specific requirements for interacting with Pipeline Streams, please provide more details so I can assist you accordingly.
let me rephrase my original question:
How would you take a file from a URL, upload it to /tmp, and then get the uploaded file as a buffer to use in future steps?
To download a file from a URL and save it to the /tmp directory, and then read that file into a buffer for use in future steps, you can use the following Pipedream component code as a guide: import stream from "stream"; import { promisify } from "util"; import fs from "fs"; import got from "got"; export default defineComponent({ async run({ steps, $ }) { // Download the file to /tmp const pipeline = promisify(stream.pipeline); const filePath = '/tmp/downloaded_file'; // You can specify your file name and extension await pipeline( got.stream("https://example.com/file"), // Replace with your file URL fs.createWriteStream(filePath) ); // Read the file into a buffer const fileBuffer = fs.readFileSync(filePath); // Use the buffer in future steps // For example, you can return the buffer to use it in the next step return fileBuffer; }, }) This code does the following: 1. It uses the got library to stream a file from a URL. 2. It saves the streamed file to the /tmp directory using fs.createWriteStream. 3. It reads the saved file into a buffer using fs.readFileSync. 4. It returns the buffer so you can use it in subsequent steps of your workflow. Please ensure you replace "https://example.com/file" with the actual URL of the file you want to download.
given the following code, can you explain and suggest a fix for the error “TypeError
source.on is not a function”
Code:
import { axios } from “@pipedream/platform”;
import fs from “fs”;
import FormData from ‘form-data’;
import stream from “stream”;
import { promisify } from “util”;
import got from “got”;
export default defineComponent({
props: {
cloudflare_api_key: {
type: “app”,
app: “cloudflare_api_key”,
}
},
async run({ steps, $ }) {
// Download the file to /tmp
const pipeline = promisify(stream.pipeline);
const filePath = /tmp/hot-dog // ${downloaded_file_name}`; // You can specify your file name and extension
await pipeline(
got.stream(“https://upload.wikimedia.org/wikipedia/commons/b/b1/Hot_dog_with_mustard.png”), // Replace with your file URL
fs.createWriteStream(filePath)
);
_// Read the file into a buffer_
**const** fileBuffer = fs.readFileSync(filePath);
_// Use the buffer in future steps_
_// For example, you can return the buffer to use it in the next step_
**const** form = **new** FormData();
form.append('file', fileBuffer);
form.append("metadata", {});
form.append("requireSignedURLs", **false**);
**const** apiUrl = `https://api.cloudflare.com/client/v4/accounts/${process.env.CLOUDFLARE_ACCOUNT_ID}/images/v1`;
**const** headers = {
'Content-Type': 'multipart/form-data; boundary=---011000010111000001101001',
Authorization: `Bearer ${process.env.CLOUDFLARE_IMAGES_API_KEY}`,
};
**try** {
**const** uploadResponse = **await** axios($, {
method: "POST",
url: apiUrl,
data: form,
headers: headers
});
console.log('File upload successful:', uploadResponse.data);
} **catch** (error) {
console.error('Error uploading file:', error);
}
},
});
The error you’re encountering, TypeError: source.on is not a function, typically occurs when you’re trying to use an event emitter method on an object that is not an instance of an event emitter. In Node.js, streams are event emitters, but it looks like you’re trying to use got.stream as a source for stream.pipeline, which should be correct as got.stream returns a stream. However, the issue might be with the FormData usage and how you’re setting the headers for the multipart/form-data request. The Content-Type header with the multipart/form-data type should include a boundary parameter, but this is typically handled by the FormData instance and should not be set manually because FormData generates its own unique boundary. When using FormData with axios, you should let axios handle the Content-Type header automatically. Here’s a revised version of your code with the fix: ``` import { axios } from “@pipedream/platform”; import fs from “fs”; import FormData from ‘form-data’; import stream from “stream”; import { promisify } from “util”; import got from “got”; export default defineComponent({ props: { cloudflare_api_key: { type: “app”, app: “cloudflare_api_key”, } }, async run({ steps, $ }) { // Download the file to /tmp const pipeline = promisify(stream.pipeline); const filePath = /tmp/hot-dog; // You can specify your file name and extension await pipeline( got.stream(“https://upload.wikimedia.org/wikipedia/commons/b/b1/Hot_dog_with_mustard.png”), // Replace with your file URL fs.createWriteStream(filePath) ); // Create a FormData instance const form = new FormData(); form.append(‘file’, fs.createReadStream(filePath)); form.append(“metadata”, JSON.stringify({})); form.append(“requireSignedURLs”, false); const apiUrl = https://api.cloudflare.com/client/v4/accounts/${this.cloudflare_api_key.$auth.account_id}/images/v1; try { const uploadResponse = await axios($, { method: “POST”, url: apiUrl, data: form, // Axios will set the correct Content-Type header with boundary headers: { Authorization: `Bearer ${this.cloudflare_api
can you please provide the full response above? it looks like you stopped generating
It seems like you’re referring to an incomplete response from a previous interaction. To assist you further, could you please provide more context or specify which response you’re referring to? If you need the full response from an HTTP request made in a Pipedream workflow, you can set returnFullResponse to true in the axios request configuration. Here’s an example of how to do this in a Node.js code step: ```
import { axios } from “@pipedream/platform”; export default defineComponent({ async run({ steps, $ }) { const response = await axios($, { url: “https://api.example.com/data”, method: “GET”, returnFullResponse: true, }); return response; }, });
please return an update to this code so that axios automatically handles the content-type header:
import { axios } from “@pipedream/platform”;
import fs from “fs”;
import FormData from ‘form-data’;
import stream from “stream”;
import { promisify } from “util”;
import got from “got”;
export default defineComponent({
props: {
cloudflare_api_key: {
type: “app”,
app: “cloudflare_api_key”,
}
},
async run({ steps, $ }) {
// Download the file to /tmp
const pipeline = promisify(stream.pipeline);
const filePath = /tmp/hot-dog // ${downloaded_file_name}`; // You can specify your file name and extension
await pipeline(
got.stream(“https://upload.wikimedia.org/wikipedia/commons/b/b1/Hot_dog_with_mustard.png”), // Replace with your file URL
fs.createWriteStream(filePath)
);
_// Read the file into a buffer_
**const** fileBuffer = fs.readFileSync(filePath);
_// Use the buffer in future steps_
_// For example, you can return the buffer to use it in the next step_
**const** form = **new** FormData();
form.append('file', fileBuffer);
form.append("metadata", {});
form.append("requireSignedURLs", **false**);
**const** apiUrl = `https://api.cloudflare.com/client/v4/accounts/${process.env.CLOUDFLARE_ACCOUNT_ID}/images/v1`;
**const** headers = {
'Content-Type': 'multipart/form-data; boundary=---011000010111000001101001',
Authorization: `Bearer ${process.env.CLOUDFLARE_IMAGES_API_KEY}`,
};
**try** {
**const** uploadResponse = **await** axios($, {
method: "POST",
url: apiUrl,
data: form,
headers: headers
});
console.log('File upload successful:', uploadResponse.data);
} **catch** (error) {
console.error('Error uploading file:', error);
}
},
});
To have axios automatically handle the Content-Type header when sending multipart/form-data, you don’t need to manually set the Content-Type header. Instead, you can let axios set it for you based on the FormData instance you provide. Here’s the updated code: import { axios } from "@pipedream/platform"; import fs from "fs"; import FormData from 'form-data'; import stream from "stream"; import { promisify } from "util"; import got from "got"; export default defineComponent({ props: { cloudflare_api_key: { type: "app", app: "cloudflare_api_key", }, }, async run({ steps, $ }) { // Download the file to /tmp const pipeline = promisify(stream.pipeline); const filePath = `/tmp/hot-dog`; // You can specify your file name and extension await pipeline( got.stream("https://upload.wikimedia.org/wikipedia/commons/b/b1/Hot_dog_with_mustard.png"), // Replace with your file URL fs.createWriteStream(filePath) ); // Read the file into a buffer const fileBuffer = fs.readFileSync(filePath); // Use the buffer in future steps // For example, you can return the buffer to use it in the next step const form = new FormData(); form.append('file', fileBuffer, 'hot-dog.png'); form.append("metadata", JSON.stringify({})); form.append("requireSignedURLs", false); const apiUrl = `https://api.cloudflare.com/client/v4/accounts/${this.cloudflare_api_key.$auth.account_id}/images/v1`; try { const uploadResponse = await axios($, { method: "POST", url: apiUrl, data: form, // axios will automatically set the correct Content-Type header headers: { Authorization: `Bearer ${this.cloudflare_api_key.$auth.api_token}`, }, }); console.log('File upload successful:', uploadResponse.data); } catch (error) { console.error('Error uploading file:', error); } }, }); Please note the following changes: 1. Removed the manual Content-Type header from the headers object. 2. Added the filename in the form.append method for the file buffer. 3. Updated the `
why does the following code produce the result “Cannot read properties of undefined (reading ‘headers’)”
import { axios } from “@pipedream/platform”;
import fs from “fs”;
import FormData from “form-data”;
import stream from “stream”;
import { promisify } from “util”;
import got from “got”;
export default defineComponent({
async run({ steps, $ }) {
// Download the file to /tmp
const pipeline = promisify(stream.pipeline);
const filePath = /tmp/hot-dog; // You can specify your file name and extension
await pipeline(
got.stream(“https://upload.wikimedia.org/wikipedia/commons/b/b1/Hot_dog_with_mustard.png”), // Replace with your file URL
fs.createWriteStream(filePath)
);
_// Read the file into a buffer_
**const** fileBuffer = fs.readFileSync(filePath);
**const** form = **new** FormData();
form.append("file", fileBuffer, { filename: 'hot-dog.png', contentType: 'image/png' });
form.append("metadata", JSON.stringify({}));
form.append("requireSignedURLs", **false**);
**const** apiUrl = `https://api.cloudflare.com/client/v4/accounts/${process.env.CLOUDFLARE_ACCOUNT_ID}/images/v1`;
**try** {
**const** uploadResponse = **await** axios({
method: "POST",
url: apiUrl,
data: form,
headers: {
...form.getHeaders(), _// This will correctly set the Content-Type with boundary_
Authorization: `Bearer ${process.env.CLOUDFLARE_IMAGES_API_KEY}`,
},
});
console.log('File upload successful:', uploadResponse.data);
} **catch** (error) {
console.error('Error uploading file:', error.message);
}
},
});
The error message “Cannot read properties of undefined (reading ‘headers’)” suggests that the object you’re trying to access the headers property on is undefined. In the context of the provided code, this error could be occurring because the form variable, which is an instance of FormData, may not have a getHeaders method, or the method is not functioning as expected. However, the code you’ve provided seems to be using the form-data library correctly, and calling getHeaders() on a FormData instance should work. The issue might be related to the environment in which the code is running, or there could be a problem with the version of the form-data library or its interaction with the axios library within the Pipedream platform. To troubleshoot this issue, you can try the following steps: 1. Ensure that the form-data library is supported and works as expected within the Pipedream environment. 2. Check if there are any known issues with the form-data library’s getHeaders method in the context of Pipedream. 3. Verify that all dependencies are correctly installed and imported. 4. Log the output of form.getHeaders() before making the axios request to see if it returns the expected headers. If you continue to experience issues, please visit Pipedream’s support page for further assistance.
I can’t for the life of me figure out what might be going on, if you can take a look when you have a sec - will also submit a support ticket
when you use @pipedream/platform axios you’ll need to pass the $ as the first argument to the axios constructor (take a look at these docs). Try this code and lmk if that works:
import { axios } from "@pipedream/platform";
import fs from "fs";
import FormData from "form-data";
import stream from "stream";
import { promisify } from "util";
import got from "got";
export default defineComponent({
async run({ steps, $ }) {
// Download the file to /tmp
const pipeline = promisify(stream.pipeline);
const filePath = `/tmp/hot-dog`; // You can specify your file name and extension
await pipeline(
got.stream("https://upload.wikimedia.org/wikipedia/commons/b/b1/Hot_dog_with_mustard.png"), // Replace with your file URL
fs.createWriteStream(filePath)
);
// Read the file into a buffer
const fileBuffer = fs.readFileSync(filePath);
const form = new FormData();
form.append("file", fileBuffer, { filename: 'hot-dog.png', contentType: 'image/png' });
form.append("metadata", JSON.stringify({}));
form.append("requireSignedURLs", false);
const apiUrl = `https://api.cloudflare.com/client/v4/accounts/${process.env.CLOUDFLARE_ACCOUNT_ID}/images/v1`;
try {
const uploadResponse = await axios($, @Xavier Drieux {
method: "POST",
url: apiUrl,
data: form,
headers: {
...form.getHeaders(), // This will correctly set the Content-Type with boundary
Authorization: `Bearer ${process.env.CLOUDFLARE_IMAGES_API_KEY}`,
},
});
console.log('File upload successful:', uploadResponse.data);
} catch (error) {
console.error('Error uploading file:', error.message);
}
},
});
Classic. Let me take a look. Just at first glance, what does the “” bit do in the axios call? axios($, @Xavier Drieux { ...
Oh sorry