mirror of
https://github.com/fleetdm/fleet
synced 2026-05-22 16:39:01 +00:00
78 lines
2.4 KiB
Go
78 lines
2.4 KiB
Go
package maintainedapps
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import (
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"context"
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"fmt"
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"mime"
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"net/http"
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"net/url"
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"path"
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"time"
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"github.com/fleetdm/fleet/v4/server/contexts/ctxerr"
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"github.com/fleetdm/fleet/v4/server/fleet"
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)
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// InstallerTimeout is the timeout duration for downloading and adding a maintained app.
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const InstallerTimeout = 15 * time.Minute
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// DownloadInstaller downloads the maintained app installer located at the given URL.
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func DownloadInstaller(ctx context.Context, installerURL string, client *http.Client) (*fleet.TempFileReader, string, error) {
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// validate the URL before doing the request
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_, err := url.ParseRequestURI(installerURL)
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if err != nil {
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return nil, "", fleet.NewInvalidArgumentError(
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"fleet_maintained_app.url",
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fmt.Sprintf("Couldn't download maintained app installer. URL (%q) is invalid", installerURL),
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)
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, installerURL, nil)
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if err != nil {
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return nil, "", ctxerr.Wrapf(ctx, err, "creating request for URL %s", installerURL)
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}
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resp, err := client.Do(req)
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if err != nil {
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return nil, "", ctxerr.Wrapf(ctx, err, "performing request for URL %s", installerURL)
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}
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defer resp.Body.Close()
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if resp.StatusCode == http.StatusNotFound {
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return nil, "", fleet.NewInvalidArgumentError(
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"fleet_maintained_app.url",
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fmt.Sprintf("Couldn't download maintained app installer. URL (%q) doesn't exist. Please make sure that URLs are publicy accessible to the internet.", installerURL),
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)
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}
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// Allow all 2xx and 3xx status codes in this pass.
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if resp.StatusCode > 400 {
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return nil, "", fleet.NewInvalidArgumentError(
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"fleet_maintained_app.url",
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fmt.Sprintf("Couldn't download maintained app installer. URL (%q) received response status code %d.", installerURL, resp.StatusCode),
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)
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}
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var filename string
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cdh, ok := resp.Header["Content-Disposition"]
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if ok && len(cdh) > 0 {
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_, params, err := mime.ParseMediaType(cdh[0])
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if err == nil {
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filename = params["filename"]
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}
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}
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// Fall back on extracting the filename from the URL
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// This is OK for the first 20 apps we support, but we should do something more robust once we
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// support more apps.
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if filename == "" {
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filename = path.Base(resp.Request.URL.Path)
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}
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tfr, err := fleet.NewTempFileReader(resp.Body, nil)
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if err != nil {
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return nil, "", ctxerr.Wrapf(ctx, err, "reading installer %q contents", installerURL)
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}
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return tfr, filename, nil
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}
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