micro-server-http/handler/swagger/swagger.go

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package swagger
import (
"io/fs"
"net/http"
yamlcodec "go.unistack.org/micro-codec-yaml/v3"
rutil "go.unistack.org/micro/v3/util/reflect"
)
// Handler append to generated swagger data from dst map[string]interface{}
var Handler = func(dst map[string]interface{}, fsys fs.FS) http.HandlerFunc {
c := yamlcodec.NewCodec()
return func(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
w.WriteHeader(http.StatusNotFound)
return
}
path := r.URL.Path
if len(path) > 1 && path[0] == '/' {
path = path[1:]
}
buf, err := fs.ReadFile(fsys, path)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte(err.Error()))
return
}
if dst == nil {
w.WriteHeader(http.StatusOK)
_, _ = w.Write(buf)
return
}
var src interface{}
if err = c.Unmarshal(buf, src); err != nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte(err.Error()))
return
}
if err = rutil.Merge(src, dst); err != nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte(err.Error()))
return
}
if buf, err = c.Marshal(src); err != nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte(err.Error()))
return
}
w.WriteHeader(http.StatusOK)
_, _ = w.Write(buf)
}
}