101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
package logic
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import (
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"bytes"
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"context"
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"fmt"
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"fusen-basic/basic"
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"fusen-gateway/gen/go/service"
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"net/http"
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"regexp"
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"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
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"google.golang.org/protobuf/encoding/protojson"
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"google.golang.org/protobuf/proto"
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)
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type EmptyMarshaler struct {
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runtime.JSONPb
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}
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func (m *EmptyMarshaler) Marshal(v interface{}) ([]byte, error) {
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return nil, nil
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}
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var fsDefaultProtoJSON = &runtime.JSONPb{
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MarshalOptions: protojson.MarshalOptions{
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EmitUnpopulated: true,
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UseProtoNames: true,
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},
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UnmarshalOptions: protojson.UnmarshalOptions{
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DiscardUnknown: true,
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},
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}
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var codeRE = regexp.MustCompile(`(?i)"code"\s*:\s*(\d+)`)
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func WriteFusenResponse(fsHeader string, w http.ResponseWriter, resp proto.Message) error {
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w.WriteHeader(200)
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var buf = bytes.NewBufferString(fsHeader[:len(fsHeader)-1] + ",")
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var rdata []byte
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var err error
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if customResp, ok := resp.(*service.Response); ok {
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if customResp.GetData() != nil {
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rdata, err = fsDefaultProtoJSON.Marshal(customResp.GetData())
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if err != nil {
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return err
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}
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} else {
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rdata = []byte("null")
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}
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} else {
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rdata, err = fsDefaultProtoJSON.Marshal(resp)
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if err != nil {
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return err
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}
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}
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buf.WriteString(`"data":`)
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buf.Write(rdata)
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buf.WriteString(`}`)
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w.Write(buf.Bytes())
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return nil
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}
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func ResponseHeaderMatcher(ctx context.Context, w http.ResponseWriter, resp proto.Message) error {
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headers := w.Header()
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key := http.CanonicalHeaderKey(basic.GM_FusenResponse.GrpcMetadataKey())
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if grpcResp, ok := headers[key]; ok {
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fsHeader := grpcResp[0]
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code := codeRE.FindStringSubmatch(string(fsHeader))
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if len(code) > 0 && code[1] != "200" {
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return WriteFusenResponse(fsHeader, w, resp)
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}
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// 判断自定返回的内容, 用html的页面返回等...
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selfwrite := http.CanonicalHeaderKey(basic.GM_SelfWrite.GrpcMetadataKey())
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if sw, ok := headers[selfwrite]; ok {
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w.WriteHeader(200)
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w.Write([]byte(sw[0]))
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return nil
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}
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// 重定向
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redirect := http.CanonicalHeaderKey(basic.GM_Redirect.GrpcMetadataKey())
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if location, ok := headers[redirect]; ok {
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w.WriteHeader(http.StatusFound)
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w.Header().Set("Location", location[0])
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return nil
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}
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return WriteFusenResponse(fsHeader, w, resp)
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}
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w.Write([]byte(fmt.Sprintf("%s error", basic.GM_FusenResponse.String())))
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return nil
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}
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