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115 lines
2.8 KiB
115 lines
2.8 KiB
package util
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import (
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"bytes"
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"fmt"
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"github.com/valyala/fasthttp"
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"sync"
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"time"
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)
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var (
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fastClient = &fasthttp.Client{
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NoDefaultUserAgentHeader: true, // Don't send: User-Agent: fasthttp
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MaxConnsPerHost: 1024,
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ReadBufferSize: 4096, // Make sure to set this big enough that your whole request can be read at once.
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WriteBufferSize: 64 * 1024, // Same but for your response.
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ReadTimeout: time.Second,
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WriteTimeout: time.Second,
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MaxIdleConnDuration: time.Minute,
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DisableHeaderNamesNormalizing: true, // If you set the case on your headers correctly you can enable this.
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}
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// Put everything in pools to prevent garbage.
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bytesPool = sync.Pool{
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New: func() interface{} {
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b := make([]byte, 0)
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return &b
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},
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}
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responsePool = sync.Pool{
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New: func() interface{} {
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return make(chan *fasthttp.Response)
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},
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}
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)
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func FastGet(url string) ([]byte, bool, error) {
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req := fasthttp.AcquireRequest()
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res := fasthttp.AcquireResponse()
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defer fasthttp.ReleaseRequest(req)
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defer fasthttp.ReleaseResponse(res)
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req.SetRequestURIBytes([]byte(url))
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req.Header.Add("Accept-Encoding", "gzip")
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err := fastClient.Do(req, res)
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if err != nil {
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return nil, true, err
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}
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var data []byte
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contentEncoding := res.Header.Peek("Content-Encoding")
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if bytes.Compare(contentEncoding, []byte("gzip")) == 0 {
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data, err = res.BodyGunzip()
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} else {
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data = res.Body()
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}
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out := make([]byte, len(data))
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copy(out, data)
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if res.StatusCode() >= 400 {
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retryable := res.StatusCode() >= 500
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return nil, retryable, fmt.Errorf("%s: %d", url, res.StatusCode())
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}
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if err != nil {
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return nil, false, err
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}
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return out, false, nil
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}
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func FastReadUrlAsStream(fileUrl string, cipherKey []byte, isContentGzipped bool, isFullChunk bool, offset int64, size int, fn func(data []byte)) (retryable bool, err error) {
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if cipherKey != nil {
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return readEncryptedUrl(fileUrl, cipherKey, isContentGzipped, isFullChunk, offset, size, fn)
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}
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req := fasthttp.AcquireRequest()
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res := fasthttp.AcquireResponse()
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defer fasthttp.ReleaseRequest(req)
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defer fasthttp.ReleaseResponse(res)
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req.SetRequestURIBytes([]byte(fileUrl))
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if isFullChunk {
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req.Header.Add("Accept-Encoding", "gzip")
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} else {
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req.Header.Add("Range", fmt.Sprintf("bytes=%d-%d", offset, offset+int64(size)-1))
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}
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if err = fastClient.Do(req, res); err != nil {
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return true, err
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}
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if res.StatusCode() >= 400 {
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retryable = res.StatusCode() >= 500
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return retryable, fmt.Errorf("%s: %d", fileUrl, res.StatusCode())
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}
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contentEncoding := res.Header.Peek("Content-Encoding")
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if bytes.Compare(contentEncoding, []byte("gzip")) == 0 {
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bodyData, err := res.BodyGunzip()
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if err != nil {
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return false, err
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}
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fn(bodyData)
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} else {
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fn(res.Body())
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}
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return false, nil
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}
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