110 lines
2.9 KiB
Go
110 lines
2.9 KiB
Go
package thrift
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import (
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"context"
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"fmt"
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)
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// ResponseMeta represents the metadata attached to the response.
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type ResponseMeta struct {
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// The headers in the response, if any.
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// If the underlying transport/protocol is not THeader, this will always be nil.
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Headers THeaderMap
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}
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type TClient interface {
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Call(ctx context.Context, method string, args, result TStruct) (ResponseMeta, error)
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}
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type TStandardClient struct {
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seqId int32
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iprot, oprot TProtocol
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}
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// TStandardClient implements TClient, and uses the standard message format for Thrift.
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// It is not safe for concurrent use.
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func NewTStandardClient(inputProtocol, outputProtocol TProtocol) *TStandardClient {
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return &TStandardClient{
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iprot: inputProtocol,
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oprot: outputProtocol,
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}
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}
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func (p *TStandardClient) Send(ctx context.Context, oprot TProtocol, seqId int32, method string, args TStruct) error {
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// Set headers from context object on THeaderProtocol
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if headerProt, ok := oprot.(*THeaderProtocol); ok {
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headerProt.ClearWriteHeaders()
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for _, key := range GetWriteHeaderList(ctx) {
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if value, ok := GetHeader(ctx, key); ok {
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headerProt.SetWriteHeader(key, value)
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}
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}
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}
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if err := oprot.WriteMessageBegin(ctx, method, CALL, seqId); err != nil {
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return err
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}
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if err := args.Write(ctx, oprot); err != nil {
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return err
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}
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if err := oprot.WriteMessageEnd(ctx); err != nil {
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return err
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}
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return oprot.Flush(ctx)
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}
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func (p *TStandardClient) Recv(ctx context.Context, iprot TProtocol, seqId int32, method string, result TStruct) error {
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rMethod, rTypeId, rSeqId, err := iprot.ReadMessageBegin(ctx)
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if err != nil {
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return err
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}
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if method != rMethod {
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return NewTApplicationException(WRONG_METHOD_NAME, fmt.Sprintf("%s: wrong method name", method))
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} else if seqId != rSeqId {
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return NewTApplicationException(BAD_SEQUENCE_ID, fmt.Sprintf("%s: out of order sequence response", method))
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} else if rTypeId == EXCEPTION {
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var exception tApplicationException
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if err := exception.Read(ctx, iprot); err != nil {
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return err
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}
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if err := iprot.ReadMessageEnd(ctx); err != nil {
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return err
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}
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return &exception
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} else if rTypeId != REPLY {
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return NewTApplicationException(INVALID_MESSAGE_TYPE_EXCEPTION, fmt.Sprintf("%s: invalid message type", method))
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}
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if err := result.Read(ctx, iprot); err != nil {
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return err
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}
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return iprot.ReadMessageEnd(ctx)
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}
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func (p *TStandardClient) Call(ctx context.Context, method string, args, result TStruct) (ResponseMeta, error) {
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p.seqId++
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seqId := p.seqId
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if err := p.Send(ctx, p.oprot, seqId, method, args); err != nil {
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return ResponseMeta{}, err
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}
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// method is oneway
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if result == nil {
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return ResponseMeta{}, nil
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}
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err := p.Recv(ctx, p.iprot, seqId, method, result)
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var headers THeaderMap
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if hp, ok := p.iprot.(*THeaderProtocol); ok {
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headers = hp.transport.readHeaders
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}
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return ResponseMeta{
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Headers: headers,
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}, err
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}
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