vt/link-shortening-service
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Add CORS Support to allow frontend requests
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This commit is contained in:
Konstantin Hintermayer
2026-06-03 13:22:14 +02:00
parent d348d0bcbe
commit ce93c5f423
4 changed files with 22 additions and 1 deletions
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5
go.mod
View File

@@ -22,6 +22,11 @@ require (
go.opentelemetry.io/otel/sdk/metric v1.44.0
)
require (
connectrpc.com/cors v0.1.0 // indirect
github.com/rs/cors v1.11.1 // indirect
)
require (
buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.11-20260415201107-50325440f8f2.1 // indirect
buf.build/go/protovalidate v1.2.0 // indirect

4
go.sum
View File

@@ -10,6 +10,8 @@ cel.dev/expr v0.25.1 h1:1KrZg61W6TWSxuNZ37Xy49ps13NUovb66QLprthtwi4=
cel.dev/expr v0.25.1/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4=
connectrpc.com/connect v1.20.0 h1:6TNDAB+WeNd2uolWNlYczB5E0KNNaVMNUEx8JEUsPmQ=
connectrpc.com/connect v1.20.0/go.mod h1:A2ygJrukXwWy32vkCAAHNVguZrqZ+jeZ9rGRnGR4dN4=
connectrpc.com/cors v0.1.0 h1:f3gTXJyDZPrDIZCQ567jxfD9PAIpopHiRDnJRt3QuOQ=
connectrpc.com/cors v0.1.0/go.mod h1:v8SJZCPfHtGH1zsm+Ttajpozd4cYIUryl4dFB6QEpfg=
connectrpc.com/grpcreflect v1.3.0 h1:Y4V+ACf8/vOb1XOc251Qun7jMB75gCUNw6llvB9csXc=
connectrpc.com/grpcreflect v1.3.0/go.mod h1:nfloOtCS8VUQOQ1+GTdFzVg2CJo4ZGaat8JIovCtDYs=
connectrpc.com/validate v0.6.0 h1:DcrgDKt2ZScrUs/d/mh9itD2yeEa0UbBBa+i0mwzx+4=
@@ -46,6 +48,8 @@ github.com/lib/pq v1.12.3 h1:tTWxr2YLKwIvK90ZXEw8GP7UFHtcbTtty8zsI+YjrfQ=
github.com/lib/pq v1.12.3/go.mod h1:/p+8NSbOcwzAEI7wiMXFlgydTwcgTr3OSKMsD2BitpA=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/rs/cors v1.11.1 h1:eU3gRzXLRK57F5rKMGMZURNdIG4EoAmX8k94r9wXWHA=
github.com/rs/cors v1.11.1/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=
github.com/stoewer/go-strcase v1.3.1 h1:iS0MdW+kVTxgMoE1LAZyMiYJFKlOzLooE4MxjirtkAs=
github.com/stoewer/go-strcase v1.3.1/go.mod h1:fAH5hQ5pehh+j3nZfvwdk2RgEgQjAoM8wodgtPmh1xo=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=

1
internal/config/config.go
View File

@@ -10,6 +10,7 @@ type Config struct {
LISTEN_ON string `json:"listen_on"`
TRUSTED_PROXIES []string `json:"trusted_proxies"`
OTLP_ENDPOINT string `json:"otlp_endpoint"`
ALLOWED_ORIGINS []string `json:"allowed_origins"`
}
func Read() *Config {

13
main.go
View File

@@ -7,6 +7,7 @@ import (
"os"
"connectrpc.com/connect"
connectcors "connectrpc.com/cors"
"connectrpc.com/grpcreflect"
"connectrpc.com/validate"
"git.kocoder.xyz/vt/shortener/internal/config"
@@ -15,6 +16,7 @@ import (
"git.kocoder.xyz/vt/shortener/internal/service"
"git.kocoder.xyz/vt/shortener/internal/telemetry"
_ "github.com/lib/pq"
"github.com/rs/cors"
"github.com/uptrace/opentelemetry-go-extra/otelsql"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
"go.opentelemetry.io/otel/attribute"
@@ -66,8 +68,17 @@ func main() {
mux.Handle("/", srv)
c := cors.New(cors.Options{
AllowedOrigins: conf.ALLOWED_ORIGINS,
AllowedMethods: connectcors.AllowedMethods(),
AllowedHeaders: connectcors.AllowedHeaders(),
ExposedHeaders: connectcors.ExposedHeaders(),
MaxAge: 7200,
})
corsMux := c.Handler(mux)
// Wrap the server with OpenTelemetry HTTP handler for tracing & metrics
instrumentedHandler := otelhttp.NewHandler(mux, "shortener-server2")
instrumentedHandler := otelhttp.NewHandler(corsMux, "shortener-server2")
p := new(http.Protocols)
p.SetHTTP1(true)