utils decompressBody.ts

93.75% Statements 15/16

100% Branches 10/10

100% Functions 1/1

93.75% Lines 15/16

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  import { inflate, inflateRaw } from 'pako'
 
export function decompressBody(bodyBytes: ArrayBuffer, contentEncoding: string | null): string {
  if (!contentEncoding) {
    return new TextDecoder('utf-8').decode(bodyBytes)
  }
 
  const encoding = contentEncoding.trim().toLowerCase()
 
  if (encoding === 'gzip' || encoding === 'x-gzip') {
    const decompressed = inflate(new Uint8Array(bodyBytes))
    return new TextDecoder('utf-8').decode(decompressed)
  }
 
  if (encoding === 'deflate') {
    const compressed = new Uint8Array(bodyBytes)
 
    try {
      const decompressed = inflate(compressed)
      return new TextDecoder('utf-8').decode(decompressed)
    } catch {
      const decompressed = inflateRaw(compressed)
      return new TextDecoder('utf-8').decode(decompressed)
    }
  }
 
  if (encoding === 'identity') {
    return new TextDecoder('utf-8').decode(bodyBytes)
  }
 
  throw new Error(`Unsupported Content-Encoding: ${encoding}`)
}