Invalid unmarshalling of prototype
Feb 09, 2024 pm 01:51 PMphp Xiaobian Yuzai introduces to you "Invalid Unorganization of Prototype". In software development, prototypes are an important concept used to quickly verify and demonstrate design ideas. However, sometimes a prototype is considered ineffective because it may not achieve the desired goals or meet user needs. In this case, we need to invalidate the prototype, find out the problem, and find a solution. This article explores the importance of prototypal ineffective degrouping and how to do it effectively.
Question content
I am trying to decode raw data. But the prototype is not decoded correctly.
This is what I'm doing:
decodedstr, err := base64.stdencoding.decodestring(request.body) if err != nil { panic("malformed input") } data := &tracepb.exporttraceservicerequest{} if err := proto.unmarshal(decodedstr, data); err != nil { log.fatalln("failed to parse:", err) } log.printf("response - %v", data)
The output is as follows:
response - resource_spans:{resource:{attributes:{key:"service.name" value:{string_value:"node_app"}} attributes:{key:"telemetry.sdk.language" value:{string_value:"nodejs"}} attributes:{key:"telemetry.sdk.name" value:{string_value:"opentelemetry"}} attributes:{key:"telemetry.sdk.version" value:{string_value:"1.8.0"}} attributes:{key:"process.pid" value:{int_value:1}} attributes:{key:"process.executable.name" value:{string_value:"node"}} attributes:{key:"process.command" value:{string_value:"/usr/app/index.js"}} attributes:{key:"process.command_line" value:{string_value:"/usr/local/bin/node /usr/app/index.js"}} attributes:{key:"process.runtime.version" value:{string_value:"18.13.0"}} attributes:{key:"process.runtime.name" value:{string_value:"nodejs"}} attributes:{key:"process.runtime.description" value:{string_value:"node.js"}}} scope_spans:{scope:{name:"@opentelemetry/instrumentation-express" version:"0.32.0"} spans:{trace_id:"\xb5\x81\x91\x8b\x02\x9a/\xf1\x08\x06\xaf~\xea\x9fq\xc0" span_id:"t\x06\x89m\x1ex\xf9a" parent_span_id:"?\xbc\x18`o\xa5\xb8\xe1" name:"middleware - query" kind:span_kind_internal start_time_unix_nano:1673434036590614272 end_time_unix_nano:1673434036590671104 attributes:{key:"http.route" value:{string_value:"/"}} attributes:{key:"express.name" value:{string_value:"query"}} attributes:{key:"express.type" value:{string_value:"middleware"}} status:{}} spans:{trace_id:"\xb5\x81\x91\x8b\x02\x9a/\xf1\x08\x06\xaf~\xea\x9fq\xc0" span_id:"\xd5c\xf7>\xf6cxz" parent_span_id:"?\xbc\x18`o\xa5\xb8\xe1" name:"middleware - expressinit" kind:span_kind_internal start_time_unix_nano:1673434036590760704
I don’t know why traceid is displayed like this:
spans:{trace_id:"\xb5\x81\x91\x8b\x02\x9a/\xf1\x08\x06\xaf~\xea\x9fQ\xc0"
I am new to go language. Any help would be greatly appreciated
Workaround
Use the encoding/hex
module's hex.EncodeToString()
function to convert bytes
Convert to hex
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