This topic was automatically generated from Slack. You can find the original thread here.
can you write me a script that gets a file from file store called data.csv, checks how many rows are in it and appends an array from a prevsiou step to the data.csv and loads it back to the file store?
Sure, I can help you with that. Below is a Pipedream component script that will: 1. Download the data.csv file from the File Store. 2. Check how many rows are in the file. 3. Append an array from a previous step to the data.csv. 4. Upload the modified file back to the File Store. import { axios } from "@pipedream/platform"; import fs from "fs"; import path from "path"; import csv from "csv-parser"; import { parse } from "json2csv"; export default defineComponent({ props: { data: { type: "data_store" }, }, async run({ steps, $ }) { // Step 1: Download the file from the File Store const filePath = "/tmp/data.csv"; await $.files.download({ url: "https://path-to-your-file-store/data.csv", path: filePath, }); // Step 2: Check how many rows are in the file const rows = []; await new Promise((resolve, reject) => { fs.createReadStream(filePath) .pipe(csv()) .on("data", (data) => rows.push(data)) .on("end", resolve) .on("error", reject); }); console.log(`Number of rows in the file: ${rows.length}`); // Step 3: Append an array from a previous step to the data.csv const newData = steps.previousStep.arrayData; // Replace with the actual step and array data const updatedRows = [...rows, ...newData]; // Convert updated rows to CSV format const csvData = parse(updatedRows); // Write the updated CSV data back to the file fs.writeFileSync(filePath, csvData); // Step 4: Upload the modified file back to the File Store const uploadResponse = await $.files.upload({ path: filePath, filename: "data.csv", }); return uploadResponse; }, }); ### Explanation: 1. Download the file: The $.files.download method downloads the data.csv file to the /tmp directory. 2. Check the number of rows: The script reads the CSV file and counts the number of rows using the csv-parser library. 3. ****Append new data
not a data_store the file store in the
i thin it would be const file = $.files.open(‘data.csv’)
To interact with a file in the Pipedream File Store, you can use the $.files.open method. Here’s an example of how you can open a file called data.csv and log its S3 URL for public access: export default defineComponent({ async run({ steps, $ }) { // Open the file by its path in the File Store const file = $.files.open('data.csv'); // Log the S3 URL to access the file publicly return await file.toUrl(); }, }) This code snippet demonstrates how to open a file from the File Store and get its public URL. You can then read, write, delete the file, and more using the methods provided by the File class. For more details, you can refer to the Pipedream File Store documentation.
how do I save the file back to the $.files when completed?
To save a file back to the $.files File Store in Pipedream, you can use the $.files.write method within a Node.js code step. Here’s an example of how you can do this: import { axios } from "@pipedream/platform"; export default defineComponent({ async run({ steps, $ }) { // Example content to be saved const content = "This is the content of the file"; // Write the content to a file in the File Store const file = await $.files.write("example.txt", content); return file; } }); In this example: 1. The content variable holds the data you want to save to the file. 2. The $.files.write method is used to write the content to a file named example.txt in the File Store. 3. The file variable will contain information about the saved file, which is returned at the end of the step. You can replace "example.txt" and content with your desired file name and content. This will save the file back to the $.files File Store when the workflow is executed.
so can you write me a complete function
• that gets data.csv from the file Store
• Appends the array of steps.trigger.event.body to the end of the data in that file
• then saves it back to the file store with the same name
Sure, I can help you with that. Below is a complete Pipedream component that: 1. Retrieves data.csv from the file store. 2. Appends the array of steps.trigger.event.body to the end of the data in that file. 3. Saves it back to the file store with the same name. import fs from "fs"; import { axios } from "@pipedream/platform"; import { file } from "tmp-promise"; export default defineComponent({ props: { fileStore: { type: "app", app: "file_store", }, }, async run({ steps, $ }) { // Step 1: Retrieve data.csv from the file store const fileUrl = `https://api.filestore.com/files/data.csv`; // Replace with actual file store API URL const response = await axios($, { url: fileUrl, headers: { Authorization: `Bearer ${this.fileStore.$auth.api_key}`, }, responseType: "arraybuffer", }); // Step 2: Write the retrieved data to a temporary file const { path, cleanup } = await file(); await fs.promises.writeFile(path, response); // Step 3: Append the array of steps.trigger.event.body to the end of the data in that file const newData = steps.trigger.event.body; await fs.promises.appendFile(path, `\n${newData.join(",")}`); // Step 4: Save the updated file back to the file store with the same name const updatedFile = await fs.promises.readFile(path); await axios($, { method: "PUT", url: fileUrl, headers: { Authorization: `Bearer ${this.fileStore.$auth.api_key}`, "Content-Type": "text/csv", }, data: updatedFile, }); // Clean up the temporary file await cleanup(); return "File updated successfully"; }, }); ### Explanation: 1. Retrieve data.csv from the file store: The code makes an HTTP GET request to the file store API to retrieve data.csv. 2. Write the retrieved data to a temporary file: The data is written to a temporary file using the fs module. 3. ****Append the array of `steps.trigger.event
Sorry I might have confused this
would the upload be like this
Uploading files from the workflow’s /tmp directory
File.fromFile() can upload a file stored within the workflow’s /tmp directory to the File Store.
First open a new file at a specific path in the File Store, and then pass a URL to the fromFile method on that new file:
export default defineComponent({
async run({ steps, $ }) {
// Upload a file to the File Store from the local /tmp/ directory
const file = await $.files.open('recording.mp3').fromFile('/tmp/recording.mp3')
// Display the URL to the File Store hosted file
console.log(await file.toUrl())
},
})
and wouldnt the open be like this?
export default defineComponent({
async run({ steps, $ }) {
// Open the file by it’s path in the File Store
const file = $.files.open(‘example.png’)
// Log the S3 url to access the file publicly
return await file.toUrl()
},
})
like this
// To use any npm package, just import it
// import axios from “axios”
export default defineComponent({
async run({ steps, $ }) {
const file = $.files.open(‘data.csv’)
return await file.toUrl()
},
})
To use the $.files API to open a file and return its URL, you can use the following Pipedream component code: export default defineComponent({ async run({ steps, $ }) { const file = await $.files.open('data.csv'); return file.toUrl(); }, }); Here’s a breakdown of the code: 1. Importing the Component: The defineComponent function is used to define a Pipedream component. 2. Async Run Method: The run method is an asynchronous function that takes { steps, $ } as arguments. 3. Opening the File: The $.files.open method is used to open the file data.csv. 4. Returning the URL: The toUrl method is called on the file object to get its URL, which is then returned. This code will open the file data.csv and return its URL. If you need any further assistance, feel free to ask!
So can I get the values in the file and then append steps.trigger.event.body; to the end of the list
there are two columns in file
Yes, your understanding is correct. Here are the two examples you provided, formatted properly: ### Uploading a file from the /tmp directory to the File Store export default defineComponent({ async run({ steps, $ }) { // Upload a file to the File Store from the local /tmp/ directory const file = await $.files.open('recording.mp3').fromFile('/tmp/recording.mp3'); // Display the URL to the File Store hosted file console.log(await file.toUrl()); }, }); ### Opening a file by its path in the File Store and logging the S3 URL export default defineComponent({ async run({ steps, $ }) { // Open the file by its path in the File Store const file = $.files.open('example.png'); // Log the S3 URL to access the file publicly return await file.toUrl(); }, }); Both examples correctly demonstrate how to upload a file from the /tmp directory to the File Store and how to open a file by its path in the File Store, respectively. If you have any further questions or need additional clarifications, feel free to ask!
To help you append steps.trigger.event.body to the end of a list in a file, I’ll need a bit more information: 1. What is the format of the file you’re working with (e.g., CSV, JSON, plain text)? 2. How are the two columns in the file structured? 3. What kind of data is contained in steps.trigger.event.body? With this information, I can provide a more accurate and tailored solution.
[{"Id":"304106","SyncToken":"0"},{"Id":"304055","SyncToken":"0"},{"Id":"239797","SyncToken":"1"}]To convert the array of objects from steps.trigger.event.body to a CSV format with two columns, you can use a Node.js code step in your Pipedream workflow. Below is an example of how you can achieve this: export default defineComponent({ async run({ steps, $ }) { const data = steps.trigger.event.body; // Define the CSV header const header = "Id,SyncToken\n"; // Map the data to CSV rows const rows = data.map(item => `${item.Id},${item.SyncToken}`).join("\n"); // Combine the header and rows const csv = header + rows; // Return the CSV data return csv; } }); ### Explanation: 1. Import and Define Component: The defineComponent function is used to define the Pipedream component. 2. Access Event Data: The data variable is assigned the value of steps.trigger.event.body, which contains the array of objects. 3. Define CSV Header: The header variable contains the CSV header with the column names “Id” and “SyncToken”. 4. Map Data to CSV Rows: The rows variable maps each object in the array to a CSV row, joining the “Id” and “SyncToken” values with a comma. 5. Combine Header and Rows: The csv variable combines the header and the rows into a single CSV string. 6. Return CSV Data: The final CSV string is returned from the step. This code will convert your array of objects into a CSV format with two columns: “Id” and “SyncToken”. You can then use this CSV data in subsequent steps of your workflow.
great, but i would like to have this within this
export default defineComponent({
async run({ steps, $ }) {
const file = await $.files.open('data.csv');
return file.toUrl();
},
});
Certainly! You can integrate the File.fromUrl() method within your existing component to upload a file from a URL and then retrieve its pre-signed GET URL. Here’s how you can do it: export default defineComponent({ async run({ steps, $ }) { // Upload a file to the File Store by a URL const file = await $.files.open('data.csv').fromUrl('https://example.com/path/to/your/file.csv'); // Retrieve the pre-signed GET URL for the uploaded file const url = await file.toUrl(); return url; }, }); This component will upload a file from the specified URL to the File Store and then return the pre-signed GET URL for the uploaded file. Make sure to replace 'https://example.com/path/to/your/file.csv' with the actual URL of the file you want to upload.
can you put these together.
export default defineComponent({
async run({ steps, $ }) {
const file = await $.files.open('data.csv');
return file.toUrl();
},
});
export default defineComponent({
async run({ steps, $ }) {
const data = steps.trigger.event.body;
// Define the CSV header
const header = "Id,SyncToken\n";
// Map the data to CSV rows
const rows = data.map(item => `${item.Id},${item.SyncToken}`).join("\n");
// Combine the header and rows
const csv = header + rows;
// Return the CSV data
return csv;
}
});
so they are one function?
Certainly! To combine these two functions into one, we’ll need to first generate the CSV data from the event body and then save it to a file. Finally, we’ll return the URL of the saved file. Here’s the combined Pipedream component: import fs from "fs"; import { axios } from "@pipedream/platform"; export default defineComponent({ async run({ steps, $ }) { const data = steps.trigger.event.body; // Define the CSV header const header = "Id,SyncToken\n"; // Map the data to CSV rows const rows = data.map(item => `${item.Id},${item.SyncToken}`).join("\n"); // Combine the header and rows const csv = header + rows; // Write the CSV data to a file in /tmp directory const filePath = "/tmp/data.csv"; await fs.promises.writeFile(filePath, csv); // Open the file and return its URL const file = await $.files.open(filePath); return file.toUrl(); } }); ### Explanation: 1. Import Required Modules: We import fs for file operations and axios from @pipedream/platform (although axios is not used in this specific example, it’s included as a good practice for future HTTP requests). 2. Generate CSV Data: We generate the CSV data from the event body. 3. Write CSV to File: We write the generated CSV data to a file in the /tmp directory. 4. Return File URL: We open the file and return its URL. This combined component will handle both generating the CSV data and saving it to a file, then returning the URL of the saved file.