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Adds
DAPR_GRPC_ENPOINT support to client (dapr#475)
* Adds `DAPR_GRPC_ENPOINT` support to client PR adds `DAPR_GRPC_ENPOINT` environment variable support to client. Address parser respects http[s] schemes, and TLS query options, as per [0008-S-sidecar-endpoint-tls.md](https://github.com/dapr/proposals/blob/main/0008-S-sidecar-endpoint-tls.md). `DAPR_GRPC_ENDPONT` takes precedence over `DAPR_GRPC_PORT`. Signed-off-by: joshvanl <[email protected]> * Remove errors.Join to have compatibility with Go 1.19 Signed-off-by: joshvanl <[email protected]> --------- Signed-off-by: joshvanl <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| /* | ||
| Copyright 2023 The Dapr Authors | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package internal | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "net" | ||
| "net/url" | ||
| "strings" | ||
| ) | ||
|
|
||
| // Parsed represents a parsed gRPC endpoint. | ||
| type Parsed struct { | ||
| Target string | ||
| TLS bool | ||
| } | ||
|
|
||
| //nolint:revive | ||
| func ParseGRPCEndpoint(endpoint string) (Parsed, error) { | ||
| target := endpoint | ||
| if len(target) == 0 { | ||
| return Parsed{}, errors.New("target is required") | ||
| } | ||
|
|
||
| var dnsAuthority string | ||
| var hostname string | ||
| var tls bool | ||
|
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||
| urlSplit := strings.Split(target, ":") | ||
| if len(urlSplit) == 3 && !strings.Contains(target, "://") { | ||
| target = strings.Replace(target, ":", "://", 1) | ||
| } else if len(urlSplit) >= 2 && !strings.Contains(target, "://") && schemeKnown(urlSplit[0]) { | ||
| target = strings.Replace(target, ":", "://", 1) | ||
| } else { | ||
| urlSplit = strings.Split(target, "://") | ||
| if len(urlSplit) == 1 { | ||
| target = "dns://" + target | ||
| } else { | ||
| scheme := urlSplit[0] | ||
| if !schemeKnown(scheme) { | ||
| return Parsed{}, fmt.Errorf(("unknown scheme: %q"), scheme) | ||
| } | ||
|
|
||
| if scheme == "dns" { | ||
| urlSplit = strings.Split(target, "/") | ||
| if len(urlSplit) < 4 { | ||
| return Parsed{}, fmt.Errorf("invalid dns scheme: %q", target) | ||
| } | ||
| dnsAuthority = urlSplit[2] | ||
| target = "dns://" + urlSplit[3] | ||
| } | ||
| } | ||
| } | ||
|
|
||
| ptarget, err := url.Parse(target) | ||
| if err != nil { | ||
| return Parsed{}, err | ||
| } | ||
|
|
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| var errs []string | ||
| for k := range ptarget.Query() { | ||
| if k != "tls" { | ||
| errs = append(errs, fmt.Sprintf("unrecognized query parameter: %q", k)) | ||
| } | ||
| } | ||
| if len(errs) > 0 { | ||
| return Parsed{}, fmt.Errorf("failed to parse target %q: %s", target, strings.Join(errs, "; ")) | ||
| } | ||
|
|
||
| if ptarget.Query().Has("tls") { | ||
| if ptarget.Scheme == "http" || ptarget.Scheme == "https" { | ||
| return Parsed{}, errors.New("cannot use tls query parameter with http(s) scheme") | ||
| } | ||
|
|
||
| qtls := ptarget.Query().Get("tls") | ||
| if qtls != "true" && qtls != "false" { | ||
| return Parsed{}, fmt.Errorf("invalid value for tls query parameter: %q", qtls) | ||
| } | ||
|
|
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| tls = qtls == "true" | ||
| } | ||
|
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| scheme := ptarget.Scheme | ||
| if scheme == "https" { | ||
| tls = true | ||
| } | ||
| if scheme == "http" || scheme == "https" { | ||
| scheme = "dns" | ||
| } | ||
|
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| hostname = ptarget.Host | ||
|
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| host, port, err := net.SplitHostPort(hostname) | ||
| aerr, ok := err.(*net.AddrError) | ||
| if ok && aerr.Err == "missing port in address" { | ||
| port = "443" | ||
| } else if err != nil { | ||
| return Parsed{}, err | ||
| } else { | ||
| hostname = host | ||
| } | ||
|
|
||
| if len(hostname) == 0 { | ||
| if scheme == "dns" { | ||
| hostname = "localhost" | ||
| } else { | ||
| hostname = ptarget.Path | ||
| } | ||
| } | ||
|
|
||
| switch scheme { | ||
| case "unix": | ||
| separator := ":" | ||
| if strings.HasPrefix(endpoint, "unix://") { | ||
| separator = "://" | ||
| } | ||
| target = scheme + separator + hostname | ||
|
|
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| case "vsock": | ||
| target = scheme + ":" + hostname + ":" + port | ||
|
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| case "unix-abstract": | ||
| target = scheme + ":" + hostname | ||
|
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| case "dns": | ||
| if len(ptarget.Path) > 0 { | ||
| return Parsed{}, fmt.Errorf("path is not allowed: %q", ptarget.Path) | ||
| } | ||
|
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| if strings.Count(hostname, ":") == 7 && !strings.HasPrefix(hostname, "[") && !strings.HasSuffix(hostname, "]") { | ||
| hostname = "[" + hostname + "]" | ||
| } | ||
| if len(dnsAuthority) > 0 { | ||
| dnsAuthority = "//" + dnsAuthority + "/" | ||
| } | ||
| target = scheme + ":" + dnsAuthority + hostname + ":" + port | ||
|
|
||
| default: | ||
| return Parsed{}, fmt.Errorf("unsupported scheme: %q", scheme) | ||
| } | ||
|
|
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| return Parsed{ | ||
| Target: target, | ||
| TLS: tls, | ||
| }, nil | ||
| } | ||
|
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| func schemeKnown(scheme string) bool { | ||
| for _, s := range []string{ | ||
| "dns", | ||
| "unix", | ||
| "unix-abstract", | ||
| "vsock", | ||
| "http", | ||
| "https", | ||
| "grpc", | ||
| "grpcs", | ||
| } { | ||
| if scheme == s { | ||
| return true | ||
| } | ||
| } | ||
|
|
||
| return false | ||
| } |
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