I created the Function App, I created a Function named HttpTrigger and provided the code in the index.js file which is the following:
const { performance, promisify } = require('perf_hooks');
const fs = require('fs');
const readline = require('readline');
const multer = require('multer');
const upload = multer();
const readFileAsync = promisify(fs.readFile);
const writeFileAsync = promisify(fs.writeFile);
const processingData = [];
let sortingRequests = 0;
module.exports = async function (context, req) {
context.res = {
headers: {
'Content-Type': 'application/json'
},
};
if (req.method === 'POST') {
if (req.query.action === 'sort') {
try {
const inputFile = await processFileUpload(req);
const startTime = performance.now();
let requestsCounter = 0;
const fileContent = await readFileAsync(inputFile.path, 'utf8');
const dateArray = fileContent.split('\n');
dateArray.sort((a, b) => {
requestsCounter++;
return new Date(b) - new Date(a);
});
const sortedDateArray = dateArray.join('\n');
const data = {
requests: requestsCounter,
processingTime: performance.now() - startTime,
};
processingData.push(data);
sortingRequests += requestsCounter;
const filePath = `${context.executionContext.functionDirectory}/uploads/result.txt`;
await writeFileAsync(filePath, sortedDateArray, 'utf8');
context.res = {
status: 200,
body: { message: 'File sorted and saved as result.txt', processingData },
};
} catch (error) {
context.res = {
status: 500,
body: { error: 'Internal Server Error', details: error.message },
};
}
}
} else if (req.method === 'GET') {
if (req.query.action === 'download') {
// Handle file download
try {
const filePath = `${context.executionContext.functionDirectory}/uploads/result.txt`;
context.res = {
status: 200,
body: fs.readFileSync(filePath, 'utf8'),
headers: {
'Content-Type': 'text/plain',
'Content-Disposition': 'attachment; filename=result.txt',
},
};
context.done();
} catch (error) {
context.res = {
status: 500,
body: { error: 'Error downloading file' },
};
context.done();
}
} else if (req.query.action === 'sortingInfo') {
// Handle sorting information request
try {
const sortingInfo = {
requests: sortingRequests,
processingData: processingData,
};
context.res = {
status: 200,
body: sortingInfo,
};
context.done();
} catch (error) {
context.res = {
status: 500,
body: { error: 'Internal Server Error' },
};
context.done();
}
} else {
// Handle other GET requests as needed
try {
const greetingMessage = 'Hello from Azure Function!';
context.res = {
status: 200,
body: { message: greetingMessage },
};
context.done();
} catch (error) {
context.res = {
status: 500,
body: { error: 'Internal Server Error' },
};
context.done();
}
}
} else {
context.res = {
status: 405,
body: { error: 'Method Not Allowed' },
};
context.done();
}
};
async function processFileUpload(req) {
return new Promise((resolve, reject) => {
upload.single('inputFile')(req, {}, (err) => {
if (err) {
console.error('Error processing file upload:', err);
reject(new Error('Error processing file upload'));
} else {
resolve(req.file);
}
});
});
}
Whenever I try to send a POST or GET request to the url provided by the function I keep getting 500 (Internal Server Error).
I tried logging the error but it is always the same thing, and I can't figure out where I'm getting the code wrong because both the client-side and the server-side runs perfectly when I run it locally but it fails when I run it as a function. Does anyone have any suggestions in order to debug the code and adjust it and solve the problem?
