88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
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/**
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* @Author: fuxiao
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* @Email: 576101059@qq.com
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* @Date: 2021/8/26 1:59 下午
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* @Desc: TODO
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*/
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package http
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import (
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"os"
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"strings"
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"github.com/dobyte/http/internal"
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)
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var contentTypeToFileSuffix = map[string]string{
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"application/x-001": ".001",
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"text/h323": ".323",
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"drawing/907": ".907",
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"audio/x-mei-aac": ".acp",
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"audio/aiff": ".aif",
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"text/asa": ".asa",
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"text/asp": ".asp",
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"audio/basic": ".au",
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"application/vnd.adobe.workflow": ".awf",
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"application/x-bmp": ".bmp",
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"application/x-c4t": ".c4t",
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"application/x-cals": ".cal",
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"application/x-netcdf": ".cdf",
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"application/x-cel": ".cel",
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"application/x-g4": ".cg4",
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"application/x-cit": ".cit",
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"text/xml": ".cml",
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"application/x-cmx": ".cmx",
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"application/pkix-crl": ".crl",
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"application/x-csi": ".csi",
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"application/x-cut": ".cut",
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"application/x-dbm": ".dbm",
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}
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type Download struct {
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request *Request
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}
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func NewDownload(c *Client) *Download {
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return &Download{
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request: NewRequest(c),
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}
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}
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// Download download a file from the network address to the local.
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func (d *Download) Download(url, dir string, filename ...string) (string, error) {
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resp, err := d.request.request(MethodGet, url)
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if err != nil {
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return "", err
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}
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var path string
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if len(filename) > 0 {
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path = strings.TrimRight(dir, string(os.PathSeparator)) + string(os.PathSeparator) + filename[0]
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} else {
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path = d.genFilePath(resp, dir)
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}
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if err = internal.SaveToFile(path, resp.ReadBytes()); err != nil {
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return "", err
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}
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return path, nil
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}
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// genFilePath generate file path based on response content type
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func (d *Download) genFilePath(resp *Response, dir string) string {
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path := strings.TrimRight(dir, string(os.PathSeparator)) + string(os.PathSeparator) + internal.RandStr(16)
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if suffix := internal.GetFileType(resp.ReadBytes()); suffix != "" {
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path += "." + suffix
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}
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if internal.Exists(path) {
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return d.genFilePath(resp, dir)
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}
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return path
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}
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