/
indexhandler.go
88 lines (78 loc) · 2.6 KB
/
indexhandler.go
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package rest
import (
"fmt"
"io/ioutil"
"net/http"
opentracing "github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
)
// swagger:route GET / Index index
// Returns OK if there's no problem
// responses:
// 200: OK
// Index returns OK handles GET requests
func (p *APIContext) Index(rw http.ResponseWriter, r *http.Request) {
tracer := opentracing.GlobalTracer()
spanname := "docmanAPI.Index"
var span opentracing.Span
wireContext, err := opentracing.GlobalTracer().Extract(
opentracing.HTTPHeaders,
opentracing.HTTPHeadersCarrier(r.Header))
if err != nil {
// The method is called without a span context in the http header.
span = tracer.StartSpan(spanname)
} else {
// Create the span referring to the RPC client if available.
// If wireContext == nil, a root span will be created.
span = opentracing.StartSpan(spanname, ext.RPCServerOption(wireContext))
}
ext.SpanKindRPCClient.Set(span)
ext.HTTPUrl.Set(span, r.URL.RequestURI())
ext.HTTPMethod.Set(span, r.Method)
defer span.Finish()
rw.WriteHeader(200)
}
// swagger:route GET /version Index version
// Returns version information
// responses:
// 200: OK
// Version returns the version info for the service by reading from a static file
func (p *APIContext) Version(rw http.ResponseWriter, r *http.Request) {
tracer := opentracing.GlobalTracer()
spanname := "docmanAPI.Version"
var span opentracing.Span
wireContext, err := opentracing.GlobalTracer().Extract(
opentracing.HTTPHeaders,
opentracing.HTTPHeadersCarrier(r.Header))
if err != nil {
// The method is called without a span context in the http header.
span = tracer.StartSpan(spanname)
} else {
// Create the span referring to the RPC client if available.
// If wireContext == nil, a root span will be created.
span = opentracing.StartSpan(spanname, ext.RPCServerOption(wireContext))
}
ext.SpanKindRPCClient.Set(span)
ext.HTTPUrl.Set(span, r.URL.RequestURI())
ext.HTTPMethod.Set(span, r.Method)
defer span.Finish()
dat, err := ioutil.ReadFile("./static/version.txt")
if err != nil {
dat = append(dat, '0')
}
fmt.Fprintf(rw, "Welcome to docman API! Version:%s", dat)
}
// CorsHandler swagger:route OPTIONS /
//
// # Handler to respond to CORS preflight requests
//
// Responses:
//
// 200: OK
func CorsHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", r.Header.Get("Origin"))
w.Header().Set("Access-Control-Allow-Credentials", "true")
w.Header().Set("Access-Control-Allow-Headers", "Content-Type, lang")
w.Header().Set("Access-Control-Allow-Methods", "GET, PUT, POST, OPTIONS")
w.WriteHeader(200)
}