e8e7b83297
- Require at least 80% of number of servers now to pass - Each provider is in its own package with a common structure - Unzip package with unzipper interface - Openvpn package with extraction and download functions
131 lines
3.5 KiB
Go
131 lines
3.5 KiB
Go
// Package surfshark contains code to obtain the server information
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// for the Surshark provider.
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package surfshark
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import (
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"context"
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"errors"
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"fmt"
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"strings"
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"github.com/qdm12/gluetun/internal/models"
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"github.com/qdm12/gluetun/internal/updater/openvpn"
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"github.com/qdm12/gluetun/internal/updater/resolver"
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"github.com/qdm12/gluetun/internal/updater/unzip"
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)
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var ErrNotEnoughServers = errors.New("not enough servers found")
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func GetServers(ctx context.Context, unzipper unzip.Unzipper,
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presolver resolver.Parallel, minServers int) (
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servers []models.SurfsharkServer, warnings []string, err error) {
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const url = "https://my.surfshark.com/vpn/api/v1/server/configurations"
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contents, err := unzipper.FetchAndExtract(ctx, url)
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if err != nil {
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return nil, nil, err
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} else if len(contents) < minServers {
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return nil, nil, fmt.Errorf("%w: %d and expected at least %d",
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ErrNotEnoughServers, len(contents), minServers)
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}
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subdomainToRegion := subdomainToRegion()
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hts := make(hostToServer)
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for fileName, content := range contents {
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if !strings.HasSuffix(fileName, ".ovpn") {
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continue // not an OpenVPN file
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}
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host, warning, err := openvpn.ExtractHost(content)
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if warning != "" {
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warnings = append(warnings, warning)
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}
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if err != nil {
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// treat error as warning and go to next file
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warning := err.Error() + " in " + fileName
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warnings = append(warnings, warning)
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continue
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}
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region, err := parseHost(host, subdomainToRegion)
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if err != nil {
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// treat error as warning and go to next file
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warning := err.Error()
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warnings = append(warnings, warning)
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continue
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}
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hts.add(host, region)
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}
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if len(hts) < minServers {
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return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
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ErrNotEnoughServers, len(hts), minServers)
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}
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hosts := hts.toHostsSlice()
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hostToIPs, newWarnings, err := resolveHosts(ctx, presolver, hosts, minServers)
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warnings = append(warnings, newWarnings...)
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if err != nil {
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return nil, warnings, err
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}
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hts.adaptWithIPs(hostToIPs)
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servers = hts.toServersSlice()
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// process subdomain entries in mapping that were not in the Zip file
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subdomainsDone := hts.toSubdomainsSlice()
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for _, subdomainDone := range subdomainsDone {
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delete(subdomainToRegion, subdomainDone)
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}
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remainingServers, newWarnings, err := getRemainingServers(
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ctx, subdomainToRegion, presolver)
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warnings = append(warnings, newWarnings...)
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if err != nil {
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return nil, warnings, err
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}
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servers = append(servers, remainingServers...)
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if len(servers) < minServers {
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return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
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ErrNotEnoughServers, len(servers), minServers)
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}
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sortServers(servers)
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return servers, warnings, nil
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}
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func getRemainingServers(ctx context.Context,
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subdomainToRegionLeft map[string]string, presolver resolver.Parallel) (
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servers []models.SurfsharkServer, warnings []string, err error) {
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hosts := make([]string, 0, len(subdomainToRegionLeft))
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const suffix = ".prod.surfshark.com"
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for subdomain := range subdomainToRegionLeft {
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hosts = append(hosts, subdomain+suffix)
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}
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const minServers = 0
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hostToIPs, warnings, err := resolveHosts(ctx, presolver, hosts, minServers)
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if err != nil {
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return nil, warnings, err
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}
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servers = make([]models.SurfsharkServer, 0, len(hostToIPs))
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for host, IPs := range hostToIPs {
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region, err := parseHost(host, subdomainToRegionLeft)
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if err != nil {
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return nil, warnings, err
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}
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server := models.SurfsharkServer{
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Region: region,
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IPs: IPs,
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}
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servers = append(servers, server)
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}
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return servers, warnings, nil
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}
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