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This commit is contained in:
Julian Schlüter
2025-03-24 21:45:12 +01:00
commit d640f5007f
19 changed files with 1325 additions and 0 deletions
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15
client/go.mod Normal file
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module thumbnailclient
go 1.24.1
require (
google.golang.org/grpc v1.71.0
google.golang.org/protobuf v1.36.6
)
require (
golang.org/x/net v0.34.0 // indirect
golang.org/x/sys v0.29.0 // indirect
golang.org/x/text v0.21.0 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f // indirect
)

34
client/go.sum Normal file
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github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
go.opentelemetry.io/otel v1.34.0 h1:zRLXxLCgL1WyKsPVrgbSdMN4c0FMkDAskSTQP+0hdUY=
go.opentelemetry.io/otel v1.34.0/go.mod h1:OWFPOQ+h4G8xpyjgqo4SxJYdDQ/qmRH+wivy7zzx9oI=
go.opentelemetry.io/otel/metric v1.34.0 h1:+eTR3U0MyfWjRDhmFMxe2SsW64QrZ84AOhvqS7Y+PoQ=
go.opentelemetry.io/otel/metric v1.34.0/go.mod h1:CEDrp0fy2D0MvkXE+dPV7cMi8tWZwX3dmaIhwPOaqHE=
go.opentelemetry.io/otel/sdk v1.34.0 h1:95zS4k/2GOy069d321O8jWgYsW3MzVV+KuSPKp7Wr1A=
go.opentelemetry.io/otel/sdk v1.34.0/go.mod h1:0e/pNiaMAqaykJGKbi+tSjWfNNHMTxoC9qANsCzbyxU=
go.opentelemetry.io/otel/sdk/metric v1.34.0 h1:5CeK9ujjbFVL5c1PhLuStg1wxA7vQv7ce1EK0Gyvahk=
go.opentelemetry.io/otel/sdk/metric v1.34.0/go.mod h1:jQ/r8Ze28zRKoNRdkjCZxfs6YvBTG1+YIqyFVFYec5w=
go.opentelemetry.io/otel/trace v1.34.0 h1:+ouXS2V8Rd4hp4580a8q23bg0azF2nI8cqLYnC8mh/k=
go.opentelemetry.io/otel/trace v1.34.0/go.mod h1:Svm7lSjQD7kG7KJ/MUHPVXSDGz2OX4h0M2jHBhmSfRE=
golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f h1:OxYkA3wjPsZyBylwymxSHa7ViiW1Sml4ToBrncvFehI=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f/go.mod h1:+2Yz8+CLJbIfL9z73EW45avw8Lmge3xVElCP9zEKi50=
google.golang.org/grpc v1.71.0 h1:kF77BGdPTQ4/JZWMlb9VpJ5pa25aqvVqogsxNHHdeBg=
google.golang.org/grpc v1.71.0/go.mod h1:H0GRtasmQOh9LkFoCPDu3ZrwUtD1YGE+b2vYBYd/8Ec=
google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=

91
client/main.go Normal file
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package main
import (
"context"
"fmt"
"log"
"os"
"path"
"path/filepath"
"strings"
"time"
pb "thumbnailclient/proto"
"google.golang.org/grpc"
)
func main() {
conn, err := grpc.NewClient("localhost:50051", grpc.WithInsecure(), grpc.WithBlock())
if err != nil {
log.Fatalf("Failed to connect to server: %v", err)
}
defer conn.Close()
type thingy struct {
Type pb.FileType
Path string
}
client := pb.NewThumbnailServiceClient(conn)
filePath := []thingy{
{pb.FileType_IMAGE, "testdata/image-sample.png"},
{pb.FileType_PDF, "testdata/pdf-sample.pdf"},
{pb.FileType_VIDEO, "testdata/video-sample.webm"}}
for _, f := range filePath {
newFunction(f.Path, f.Type, client)
}
}
func newFunction(filePath string, ftype pb.FileType, client pb.ThumbnailServiceClient) {
fileContent, err := os.ReadFile(filePath)
if err != nil {
log.Fatalf("Error reading file: %v", err)
}
req := &pb.ThumbnailRequest{
FileContent: fileContent,
FileType: ftype,
MaxHeight: 150,
}
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
resp, err := client.GenerateThumbnail(ctx, req)
if err != nil {
log.Fatalf("Error calling GenerateThumbnail: %v", err)
}
fmt.Printf("Response: %s\n", resp.Message)
if len(resp.ThumbnailContent) > 0 {
err := saveThumbnailToFile(resp.ThumbnailContent, filePath)
if err != nil {
log.Fatalf("Error saving thumbnail to file: %v", err)
}
fmt.Println("Thumbnail saved successfully.")
} else {
log.Println("No thumbnail content received.")
}
}
// Function to save the thumbnail content to a file in the 'thumbnail/' directory
func saveThumbnailToFile(thumbnailContent []byte, filePath string) error {
// Ensure the "thumbnail" directory exists
err := os.MkdirAll("thumbnail", os.ModePerm)
if err != nil {
return fmt.Errorf("failed to create directory: %v", err)
}
// Create the file where the thumbnail will be saved
baseName := filepath.Base(filePath)
fileName := strings.TrimSuffix(baseName, filepath.Ext(baseName))
err = os.WriteFile(path.Join("thumbnail", fileName)+".jpg", thumbnailContent, 0644)
if err != nil {
return fmt.Errorf("failed to save thumbnail to file: %v", err)
}
return nil
}

274
client/proto/thumbnail.pb.go Normal file
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// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.36.6
// protoc v3.21.12
// source: thumbnail.proto
package proto
import (
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
sync "sync"
unsafe "unsafe"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// Enum for the file type
type FileType int32
const (
FileType_FILE_TYPE_UNSPECIFIED FileType = 0 // Default value for unspecified file type
FileType_IMAGE FileType = 1 // Image file
FileType_VIDEO FileType = 2 // Video file
FileType_PDF FileType = 3 // PDF file
)
// Enum value maps for FileType.
var (
FileType_name = map[int32]string{
0: "FILE_TYPE_UNSPECIFIED",
1: "IMAGE",
2: "VIDEO",
3: "PDF",
}
FileType_value = map[string]int32{
"FILE_TYPE_UNSPECIFIED": 0,
"IMAGE": 1,
"VIDEO": 2,
"PDF": 3,
}
)
func (x FileType) Enum() *FileType {
p := new(FileType)
*p = x
return p
}
func (x FileType) String() string {
return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
}
func (FileType) Descriptor() protoreflect.EnumDescriptor {
return file_thumbnail_proto_enumTypes[0].Descriptor()
}
func (FileType) Type() protoreflect.EnumType {
return &file_thumbnail_proto_enumTypes[0]
}
func (x FileType) Number() protoreflect.EnumNumber {
return protoreflect.EnumNumber(x)
}
// Deprecated: Use FileType.Descriptor instead.
func (FileType) EnumDescriptor() ([]byte, []int) {
return file_thumbnail_proto_rawDescGZIP(), []int{0}
}
// Request message for generating thumbnails
type ThumbnailRequest struct {
state protoimpl.MessageState `protogen:"open.v1"`
FileContent []byte `protobuf:"bytes,1,opt,name=file_content,json=fileContent,proto3" json:"file_content,omitempty"` // File content as bytes
FileType FileType `protobuf:"varint,2,opt,name=file_type,json=fileType,proto3,enum=thumbnail_service.FileType" json:"file_type,omitempty"` // File type (image, video, pdf)
MaxWidth int32 `protobuf:"varint,3,opt,name=max_width,json=maxWidth,proto3" json:"max_width,omitempty"` // Optional max width for resizing (0 means no limit)
MaxHeight int32 `protobuf:"varint,4,opt,name=max_height,json=maxHeight,proto3" json:"max_height,omitempty"` // Optional max height for resizing (0 means no limit)
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *ThumbnailRequest) Reset() {
*x = ThumbnailRequest{}
mi := &file_thumbnail_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *ThumbnailRequest) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*ThumbnailRequest) ProtoMessage() {}
func (x *ThumbnailRequest) ProtoReflect() protoreflect.Message {
mi := &file_thumbnail_proto_msgTypes[0]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use ThumbnailRequest.ProtoReflect.Descriptor instead.
func (*ThumbnailRequest) Descriptor() ([]byte, []int) {
return file_thumbnail_proto_rawDescGZIP(), []int{0}
}
func (x *ThumbnailRequest) GetFileContent() []byte {
if x != nil {
return x.FileContent
}
return nil
}
func (x *ThumbnailRequest) GetFileType() FileType {
if x != nil {
return x.FileType
}
return FileType_FILE_TYPE_UNSPECIFIED
}
func (x *ThumbnailRequest) GetMaxWidth() int32 {
if x != nil {
return x.MaxWidth
}
return 0
}
func (x *ThumbnailRequest) GetMaxHeight() int32 {
if x != nil {
return x.MaxHeight
}
return 0
}
// Response message for the thumbnail generation
type ThumbnailResponse struct {
state protoimpl.MessageState `protogen:"open.v1"`
Message string `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"` // Message indicating success or failure
ThumbnailContent []byte `protobuf:"bytes,2,opt,name=thumbnail_content,json=thumbnailContent,proto3" json:"thumbnail_content,omitempty"` // Thumbnail content as bytes
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *ThumbnailResponse) Reset() {
*x = ThumbnailResponse{}
mi := &file_thumbnail_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *ThumbnailResponse) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*ThumbnailResponse) ProtoMessage() {}
func (x *ThumbnailResponse) ProtoReflect() protoreflect.Message {
mi := &file_thumbnail_proto_msgTypes[1]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use ThumbnailResponse.ProtoReflect.Descriptor instead.
func (*ThumbnailResponse) Descriptor() ([]byte, []int) {
return file_thumbnail_proto_rawDescGZIP(), []int{1}
}
func (x *ThumbnailResponse) GetMessage() string {
if x != nil {
return x.Message
}
return ""
}
func (x *ThumbnailResponse) GetThumbnailContent() []byte {
if x != nil {
return x.ThumbnailContent
}
return nil
}
var File_thumbnail_proto protoreflect.FileDescriptor
const file_thumbnail_proto_rawDesc = "" +
"\n" +
"\x0fthumbnail.proto\x12\x11thumbnail_service\"\xab\x01\n" +
"\x10ThumbnailRequest\x12!\n" +
"\ffile_content\x18\x01 \x01(\fR\vfileContent\x128\n" +
"\tfile_type\x18\x02 \x01(\x0e2\x1b.thumbnail_service.FileTypeR\bfileType\x12\x1b\n" +
"\tmax_width\x18\x03 \x01(\x05R\bmaxWidth\x12\x1d\n" +
"\n" +
"max_height\x18\x04 \x01(\x05R\tmaxHeight\"Z\n" +
"\x11ThumbnailResponse\x12\x18\n" +
"\amessage\x18\x01 \x01(\tR\amessage\x12+\n" +
"\x11thumbnail_content\x18\x02 \x01(\fR\x10thumbnailContent*D\n" +
"\bFileType\x12\x19\n" +
"\x15FILE_TYPE_UNSPECIFIED\x10\x00\x12\t\n" +
"\x05IMAGE\x10\x01\x12\t\n" +
"\x05VIDEO\x10\x02\x12\a\n" +
"\x03PDF\x10\x032r\n" +
"\x10ThumbnailService\x12^\n" +
"\x11GenerateThumbnail\x12#.thumbnail_service.ThumbnailRequest\x1a$.thumbnail_service.ThumbnailResponseB\tZ\a./protob\x06proto3"
var (
file_thumbnail_proto_rawDescOnce sync.Once
file_thumbnail_proto_rawDescData []byte
)
func file_thumbnail_proto_rawDescGZIP() []byte {
file_thumbnail_proto_rawDescOnce.Do(func() {
file_thumbnail_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_thumbnail_proto_rawDesc), len(file_thumbnail_proto_rawDesc)))
})
return file_thumbnail_proto_rawDescData
}
var file_thumbnail_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
var file_thumbnail_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_thumbnail_proto_goTypes = []any{
(FileType)(0), // 0: thumbnail_service.FileType
(*ThumbnailRequest)(nil), // 1: thumbnail_service.ThumbnailRequest
(*ThumbnailResponse)(nil), // 2: thumbnail_service.ThumbnailResponse
}
var file_thumbnail_proto_depIdxs = []int32{
0, // 0: thumbnail_service.ThumbnailRequest.file_type:type_name -> thumbnail_service.FileType
1, // 1: thumbnail_service.ThumbnailService.GenerateThumbnail:input_type -> thumbnail_service.ThumbnailRequest
2, // 2: thumbnail_service.ThumbnailService.GenerateThumbnail:output_type -> thumbnail_service.ThumbnailResponse
2, // [2:3] is the sub-list for method output_type
1, // [1:2] is the sub-list for method input_type
1, // [1:1] is the sub-list for extension type_name
1, // [1:1] is the sub-list for extension extendee
0, // [0:1] is the sub-list for field type_name
}
func init() { file_thumbnail_proto_init() }
func file_thumbnail_proto_init() {
if File_thumbnail_proto != nil {
return
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: unsafe.Slice(unsafe.StringData(file_thumbnail_proto_rawDesc), len(file_thumbnail_proto_rawDesc)),
NumEnums: 1,
NumMessages: 2,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_thumbnail_proto_goTypes,
DependencyIndexes: file_thumbnail_proto_depIdxs,
EnumInfos: file_thumbnail_proto_enumTypes,
MessageInfos: file_thumbnail_proto_msgTypes,
}.Build()
File_thumbnail_proto = out.File
file_thumbnail_proto_goTypes = nil
file_thumbnail_proto_depIdxs = nil
}

125
client/proto/thumbnail_grpc.pb.go Normal file
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// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
// versions:
// - protoc-gen-go-grpc v1.5.1
// - protoc v3.21.12
// source: thumbnail.proto
package proto
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
// Requires gRPC-Go v1.64.0 or later.
const _ = grpc.SupportPackageIsVersion9
const (
ThumbnailService_GenerateThumbnail_FullMethodName = "/thumbnail_service.ThumbnailService/GenerateThumbnail"
)
// ThumbnailServiceClient is the client API for ThumbnailService service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
//
// Service definition
type ThumbnailServiceClient interface {
GenerateThumbnail(ctx context.Context, in *ThumbnailRequest, opts ...grpc.CallOption) (*ThumbnailResponse, error)
}
type thumbnailServiceClient struct {
cc grpc.ClientConnInterface
}
func NewThumbnailServiceClient(cc grpc.ClientConnInterface) ThumbnailServiceClient {
return &thumbnailServiceClient{cc}
}
func (c *thumbnailServiceClient) GenerateThumbnail(ctx context.Context, in *ThumbnailRequest, opts ...grpc.CallOption) (*ThumbnailResponse, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(ThumbnailResponse)
err := c.cc.Invoke(ctx, ThumbnailService_GenerateThumbnail_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
// ThumbnailServiceServer is the server API for ThumbnailService service.
// All implementations must embed UnimplementedThumbnailServiceServer
// for forward compatibility.
//
// Service definition
type ThumbnailServiceServer interface {
GenerateThumbnail(context.Context, *ThumbnailRequest) (*ThumbnailResponse, error)
mustEmbedUnimplementedThumbnailServiceServer()
}
// UnimplementedThumbnailServiceServer must be embedded to have
// forward compatible implementations.
//
// NOTE: this should be embedded by value instead of pointer to avoid a nil
// pointer dereference when methods are called.
type UnimplementedThumbnailServiceServer struct{}
func (UnimplementedThumbnailServiceServer) GenerateThumbnail(context.Context, *ThumbnailRequest) (*ThumbnailResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method GenerateThumbnail not implemented")
}
func (UnimplementedThumbnailServiceServer) mustEmbedUnimplementedThumbnailServiceServer() {}
func (UnimplementedThumbnailServiceServer) testEmbeddedByValue() {}
// UnsafeThumbnailServiceServer may be embedded to opt out of forward compatibility for this service.
// Use of this interface is not recommended, as added methods to ThumbnailServiceServer will
// result in compilation errors.
type UnsafeThumbnailServiceServer interface {
mustEmbedUnimplementedThumbnailServiceServer()
}
func RegisterThumbnailServiceServer(s grpc.ServiceRegistrar, srv ThumbnailServiceServer) {
// If the following call pancis, it indicates UnimplementedThumbnailServiceServer was
// embedded by pointer and is nil. This will cause panics if an
// unimplemented method is ever invoked, so we test this at initialization
// time to prevent it from happening at runtime later due to I/O.
if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
t.testEmbeddedByValue()
}
s.RegisterService(&ThumbnailService_ServiceDesc, srv)
}
func _ThumbnailService_GenerateThumbnail_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(ThumbnailRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ThumbnailServiceServer).GenerateThumbnail(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: ThumbnailService_GenerateThumbnail_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ThumbnailServiceServer).GenerateThumbnail(ctx, req.(*ThumbnailRequest))
}
return interceptor(ctx, in, info, handler)
}
// ThumbnailService_ServiceDesc is the grpc.ServiceDesc for ThumbnailService service.
// It's only intended for direct use with grpc.RegisterService,
// and not to be introspected or modified (even as a copy)
var ThumbnailService_ServiceDesc = grpc.ServiceDesc{
ServiceName: "thumbnail_service.ThumbnailService",
HandlerType: (*ThumbnailServiceServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "GenerateThumbnail",
Handler: _ThumbnailService_GenerateThumbnail_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "thumbnail.proto",
}