#json-parsing code explainers

go

func UploadDocument(c *gin.Context) {
	fileHeader, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "file is required"})

Handling multipart uploads in Gin

multipart-upload validation error-handling

Intermediate 9 steps

python

import ijson
from decimal import Decimal

Streaming JSON aggregation with ijson

streaming json-parsing generators

Intermediate 7 steps

java

public record ServerConfig(String host, int port, boolean tls, List<String> allowedOrigins) {
 
    public ServerConfig {
        Objects.requireNonNull(host, "host is required");

Validating config with a Java record

records validation immutability

Intermediate 9 steps