Code Explainers

Code explainers tagged #file-io

java 
@GetMapping("/files/{id}")
public ResponseEntity<StreamingResponseBody> download(
        @PathVariable String id,
        @RequestHeader(value = HttpHeaders.RANGE, required = false) String rangeHeader) throws IOException {

HTTP range requests in Spring

http-range streaming file-io
Advanced 10 steps
rust 
use std::collections::BTreeSet;
use std::fs::File;
use std::io::{self, BufRead, BufReader, BufWriter, Write};
use std::path::Path;

Deduplicating and sorting words in Rust

file-io btreeset string-processing
Intermediate 6 steps
java 
public final class BomAwareReader {
 
    private static final char UTF8_BOM = '\uFEFF';
 

Skipping the UTF-8 byte-order mark in Java

file-io encoding byte-order-mark
Intermediate 6 steps
python 
import wave
import os
from dataclasses import dataclass
 

Reading WAV metadata into a dataclass

dataclass audio file-io
Beginner 5 steps
java 
public class DuplicateFinder {
 
    public Map<String, List<Path>> findDuplicates(Path root) throws IOException {
        Map<String, List<Path>> byHash = new HashMap<>();

Finding duplicate files by content hash

hashing file-io streams
Intermediate 8 steps
rust 
use std::collections::HashMap;
use std::fs::File;
use std::io::{self, BufRead, BufReader};
use std::path::Path;

Parsing INI files in Rust

parsing file-io hashmap
Intermediate 9 steps
python 
from pathlib import Path
 
from PIL import Image, ImageOps
 

Batch image resizing with Pillow

image-processing batch-jobs error-handling
Intermediate 8 steps
python 
from pathlib import Path
 
import chardet
 

Reading text files of unknown encoding in Python

encoding byte-order-mark fallback
Intermediate 8 steps
java 
package com.example.inventory;
 
import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVParser;

Reading and writing CSV with Commons CSV

csv-parsing file-io try-with-resources
Intermediate 7 steps
python 
import os
import tarfile
from pathlib import Path
 

Safely compressing and extracting tar.gz archives

file-io compression path-traversal
Intermediate 6 steps
java 
public final class ZipExtractor {
 
    private final Path targetDir;
 

Extracting a zip safely in Java

path-traversal streams file-io
Intermediate 8 steps
rust 
use std::fs;
use std::path::Path;
 
use regex::Regex;

Redacting emails in a file with Rust

regex file-io closures
Intermediate 6 steps
rust 
use std::fs::{File, OpenOptions};
use std::io::{self, Write};
use std::path::Path;
 

A buffered log writer in Rust

buffering raii file-io
Intermediate 9 steps
java 
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.http.HttpClient;

Streaming a file download with Java's HttpClient

http-client streaming file-io
Intermediate 6 steps
python 
import csv
from pathlib import Path
 
 

Splitting a large CSV into smaller files

file-io streaming csv
Intermediate 8 steps
python 
import hashlib
from pathlib import Path
 
 

Streaming SHA-256 checksums in Python

hashing file-io streaming
Intermediate 6 steps
rust 
use std::fs::File;
use std::io::{self, BufWriter};
use std::path::Path;
 

Serializing config to JSON in Rust

serialization serde file-io
Intermediate 7 steps
java 
package com.example.fs;
 
import java.io.IOException;
import java.nio.file.FileSystems;

Watching a directory with Java NIO

file-io event-loop resource-management
Intermediate 8 steps