Node.js · Theory

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js

Theory

454/723

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js

http2stream.respondWithFile(path[,headers[,options]]) function (in) is a Node.js topic. In plain words you use it for read a big CSV in an upload job. Don’t start with a slogan — start with that picture.

Smallest example: createReadStream. Type it, run it, and say what you see. If you can do that from memory, you know http2stream.respondWithFile(path[,headers[,options]]) function (in).

From the example next to this theory — http2stream.

Trap — loading the whole file into RAM. Fix that before you talk about advanced Node.js.

Viva: what is http2stream.respondWithFile(path[,headers[,options]]) function (in)? Then show createReadStream. Then name the trap.

Diagram

  request
      │
      ▼
  event loop
      │ I/O done
      ▼
  response

Exam tip

What is http2stream.respondWithFile(path[,headers[,options]]) function (in)? Show this: createReadStream. Trap: loading the whole file into RAM.

Example

const path = require("path");
const full = path.join("users", "asha", "docs");
console.log(full);
console.log(path.extname("report.pdf"));

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js — path.join builds OS-safe paths; extname reads the extension.

Short notes

Defhttp2stream.respondWithFile(path[,headers[,options]]) function (in) — read a big CSV in an upload job.
RulecreateReadStream
Traploading the whole file into RAM
Usean upload job

Node.js · Theory

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js

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Theory

454/723

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js

Smallest example: createReadStream. Type it, run it, and say what you see. If you can do that from memory, you know http2stream.respondWithFile(path[,headers[,options]]) function (in).

From the example next to this theory — http2stream.

Trap — loading the whole file into RAM. Fix that before you talk about advanced Node.js.

Viva: what is http2stream.respondWithFile(path[,headers[,options]]) function (in)? Then show createReadStream. Then name the trap.

Diagram

  request
      │
      ▼
  event loop
      │ I/O done
      ▼
  response

Exam tip

What is http2stream.respondWithFile(path[,headers[,options]]) function (in)? Show this: createReadStream. Trap: loading the whole file into RAM.

Example

const path = require("path");
const full = path.join("users", "asha", "docs");
console.log(full);
console.log(path.extname("report.pdf"));

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js — path.join builds OS-safe paths; extname reads the extension.

Short notes

Defhttp2stream.respondWithFile(path[,headers[,options]]) function (in) — read a big CSV in an upload job.
RulecreateReadStream
Traploading the whole file into RAM
Usean upload job

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js

Example

Short notes

Questions

http2stream.respondWithFile(path[,headers[,options]]) function in Node.js

Example

Short notes

Questions