{"id":208133,"date":"2025-07-08T15:28:07","date_gmt":"2025-07-08T07:28:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208133\/"},"modified":"2025-07-08T15:28:07","modified_gmt":"2025-07-08T07:28:07","slug":"%e5%a6%82%e4%bd%95%e8%a7%a3%e6%9e%90%e5%8c%85%e8%a3%85%e7%9a%84json%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208133\/","title":{"rendered":"\u5982\u4f55\u89e3\u6790\u5305\u88c5\u7684json\u5bf9\u8c61"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u89e3\u6790\u5305\u88c5\u7684json\u5bf9\u8c61<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-29 13:25:16<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u5982\u4f55\u89e3\u6790\u5305\u88c5\u7684json\u5bf9\u8c61\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60Golang<\/span>\uff0c\u6216\u8005\u662f\u5bf9Golang<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u67d0\u4e9b api \u7aef\u70b9\u53ef\u80fd\u4f1a\u8fd4\u56de\u6210\u529f\u7ed3\u679c\u6216\u9519\u8bef\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\/\/ ok\n{\n    \"status\": \"ok\",\n    \"payload\": {\n        \"id\": 10,\n        \"title\": \"sample\"\n    },\n    \"request_id\": \"lx-vhr4olm\"\n}\n\/\/ error\n{\n    \"status\": \"error\",\n    \"payload\": {\n        \"message\": \"internal error\"\n    },\n    \"trace_id\": \"lx-vhr4olm\"\n}<\/pre>\n
\u6211\u6b63\u5728\u5c1d\u8bd5\u627e\u5230\u7528 go \u89e3\u6790\u7684\u4f18\u96c5\u65b9\u6cd5\uff0c\u5c31\u50cf\u8fd9\u6837<\/p>\n
.... some code\nif status == \"ok\" {\n    struct := appstruct{} \/\/ appstruct contains 2 fields: id and title\n    _ := json.unmarshall(payloadbody, &struct)\n    return struct \n} else {\n    errorstruct := errorstruct{} \/\/ contains 1 field for message.\n    _ := json.unmarshall(payloadbody, &errorstruct) \n    return nil, errors.new(errorstruct.message)\n}<\/pre>\n
\u6211\u5f53\u524d\u7684\u4ee3\u7801\u4e0d\u9002\u7528\u4e8e\u6210\u529f\u8d1f\u8f7d\uff1a<\/p>\n
var result map[string]interface{}\njsonErr := json.Unmarshal(body, &result)\nif jsonErr != nil {\n    return nil, jsonErr\n}\nif result[\"status\"] == \"error\" {\n    errorPayload := result[\"payload\"].(map[string]string)\n    return nil, errors.New(errorPayload[\"message\"])\n} else if result[\"status\"] == \"ok\" {\n    apiResponse := AppInfo{}\n    jsonErr := json.Unmarshal([]byte(result[\"payload\"].(string)), &apiResponse)\n    if jsonErr != nil {\n        return nil, jsonErr\n    }\n    return &apiResponse, nil\n}<\/pre>\n
\u6211\u5728 json.unmarshal([]byte(result[\"payload\"].(string)), &apiresponse)<\/code> \u884c\u4e0a\u9047\u5230\u8fd0\u884c\u65f6\u9519\u8bef<\/p>\n
 http: \u6050\u614c\u670d\u52a1 [::1]:51091: \u63a5\u53e3\u8f6c\u6362\uff1a\u63a5\u53e3 {} \u662f map[string]interface {}\uff0c\u800c\u4e0d\u662f\u5b57\u7b26\u4e32 <\/p>\n
\u5f53\u7136\uff0c\u6211\u53ef\u80fd\u6709 2 \u4e2a\u7ed3\u6784\uff1a\u7528\u4e8e\u6210\u529f\u54cd\u5e94\u548c\u7528\u4e8e\u9519\u8bef\u54cd\u5e94\uff0c\u4f46\u6211\u8ba4\u4e3a\u89e3\u51b3\u6211\u7684\u95ee\u9898\u7684\u65b9\u6cd5\u592a\u590d\u6742\u4e86\u3002<\/p>\n
\u5982\u4f55\u4f18\u96c5\u5730\u89e3\u6790\u8fd9\u4e2a json\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u611f\u8c22\u63d0\u4f9b\u4f7f\u7528json.rawmessage\u7684\u60f3\u6cd5<\/p>\n
\u6211\u7684\u6700\u7ec8\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n
func parsepayload(response []byte, successpayload interface{}) error {\n    var result map[string]json.rawmessage\n    jsonerr := json.unmarshal(response, &result)\n    if jsonerr != nil {\n        return jsonerr\n    }\n    var status string\n    jsonerr = json.unmarshal(result[\"status\"], &status)\n    if jsonerr != nil {\n        return jsonerr\n    }\n    if status == \"ok\" {\n        jsonerr = json.unmarshal(result[\"payload\"], &successpayload)\n        if jsonerr != nil {\n            return jsonerr\n        }\n        return nil\n    } else if status == \"error\" {\n        errorpayload := errorpayload{}\n        jsonerr = json.unmarshal(result[\"payload\"], &errorpayload)\n        if jsonerr != nil {\n            return jsonerr\n        }\n        return errors.new(errorpayload.message)\n    }\n    log.printf(\"unknown http result status: %s\", status)\n    return errors.new(\"internal error\")\n}\n\ntype errorpayload struct {\n    message string `json:\"message\"`\n}\n\n\/\/usage\n\ntype appinfo struct {\n    id    int    `json:\"app_id\"`\n    title string `json:\"app_title\"`\n}\n\nbody := ... \/\/ read body\nappinfo := appinfo{}\nparseerr := parsepayload(body, &appinfo)\nif parseerr != nil {\n    return nil, parseerr\n}\nlog.printf(\"parsed app %v\", appinfo)\nreturn &appinfo, nil<\/pre>\n
\u6211\u771f\u7684\u4e0d\u786e\u5b9a\u95ee\u9898\u662f\u4ec0\u4e48\u3002\u6807\u51c6 encoding\/json<\/code> \u4e0d\u9700\u8981\u7ed3\u6784\u5339\u914d json \u6570\u636e\u4e2d\u7684\u6240\u6709<\/em>\u5b57\u6bb5\u3002\u4f7f\u7528\u4e00\u4e2a\u7b80\u5355\u7684\u7c7b\u578b\u5c31\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u5904\u7406\u8fd9\u4e2a\u95ee\u9898\uff1a<\/p>\n
type payload struct {\n    id      int    `json:\"id\"`\n    title   string `json:\"title\"`\n    message string `json:\"message\"`\n}\n\ntype response struct {\n    status  string  `json:\"status\"`\n    id      string  `json:\"request_id\"`\n    traceid string  `json:\"trace_id\"`\n    payload payload `json:\"payload\"`\n}<\/pre>\n
\u7136\u540e\u53ea\u9700\u89e3\u7ec4 response<\/code> \u7ed3\u6784\u4e2d\u7684\u54cd\u5e94\u5373\u53ef\uff1a<\/p>\n
var resp response\nif err := json.unmarshal(body, &resp); err != nil {\n    return err\n}<\/pre>\n
\u7136\u540e\u60a8\u53ef\u4ee5\u7b80\u5355\u5730\u68c0\u67e5 status<\/code> \u5b57\u6bb5\uff0c\u5e76\u786e\u5b9a\u4e0b\u4e00\u6b65\u8be5\u505a\u4ec0\u4e48\u3002\u4f8b\u5982\uff1a<\/p>\n
if resp.status == \"error\" {\n    return fmt.errorf(\"invalid response: %s - %s\", resp.traceid, resp.payload.message)\n}\n\/\/ handle resp.payload.id and resp.payload.title fields\nreturn nil<\/pre>\n
\u60a8\u53ef\u4ee5\u5c06\u5bf9\u72b6\u6001\u5b57\u6bb5\u7684\u8fd9\u4e9b\u68c0\u67e5\u79fb\u81f3\u54cd\u5e94\u5bf9\u8c61\u4e0a\u7684\u63a5\u6536\u5668\u51fd\u6570\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u590d\u6742\u6027\u548c\u60a8\u7684\u5177\u4f53\u9700\u6c42\u3002<\/p>\n
\u4e5f\u8bb8\u503c\u5f97\u5bf9\u6b63\u5e38\u54cd\u5e94\u4e2d\u672a\u8bbe\u7f6e\u7684\u5b57\u6bb5\u4f7f\u7528\u6307\u9488\u5b57\u6bb5\uff0c\u5e76\u4f7f\u7528 omitempty<\/code> \u9009\u9879\u6807\u8bb0\u5b83\u4eec\uff1a<\/p>\n
type payload struct {\n    id      int     `json:\"id\"`\n    title   string  `json:\"title\"`\n    message *string `json:\"message,omitempty\"`\n}\ntype response struct {\n    status  string  `json:\"status\"`\n    id      string  `json:\"request_id\"`\n    traceid *string `json:\"trace_id,omitempty\"`\n    payload payload `json:\"payload\"`\n}<\/pre>\n
\u6709\u4e86\u8fd9\u6837\u7684\u7c7b\u578b\uff0c\u4e0d\u518d\u9700\u8981\u4f9d\u8d56\u786c\u7f16\u7801\u7684\u5b57\u7b26\u4e32\u5e38\u91cf\u6765\u68c0\u67e5\u9519\u8bef\u3002\u76f8\u53cd\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5b9e\u73b0\u66f4\u901a\u7528\u7684\u68c0\u67e5\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
func (r response) iserror() bool {\n    return (r.traceid == nil) \/\/ will be set in case of an error response\n}<\/pre>\n
\u66f4\u65b0<\/h3>\n
\u6b63\u5982\u60a8\u5728\u8bc4\u8bba\u4e2d\u6307\u51fa\u7684\uff0c\u54cd\u5e94\u6b63\u6587\u5b9e\u9645\u4e0a\u6bd4\u793a\u4f8b\u4e2d\u7684 2 \u4e2a\u5b57\u6bb5\u5927\u5f97\u591a\u3002\u5f53\u7136\uff0c\u590d\u5236\u7c98\u8d34\u7ed3\u6784\u4f53\u5b9a\u4e49\u6216\u7f16\u5199\u6620\u5c04\u51fd\u6570\u5c06 payload<\/code> \u6620\u5c04\u5230\u60a8\u5df2\u6709\u7684\u7c7b\u578b\u6709\u70b9\u6beb\u65e0\u610f\u4e49\u3002<\/p>\n
\u8fd9\u91cc\u7684\u7b54\u6848\u662f\uff1a\u7ec4\u5408\u3002<\/p>\n
type payload struct {\n    appstruct \/\/ embedded the appstruct type\n    message   *string `json:\"message\"`\n}<\/pre>\n
response<\/code> \u7c7b\u578b\u4fdd\u6301\u539f\u6837\u3002\u5982\u679c\u54cd\u5e94\u6210\u529f\uff0c\u60a8\u53ef\u4ee5\u76f4\u63a5\u4ece\u54cd\u5e94\u4e2d\u83b7\u53d6 appstruct<\/code>\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
appStruct := resp.Payload.AppStruct<\/pre>\n
\u8fd9\u662f\u6709\u6548\u7684\uff0c\u56e0\u4e3a\u7c7b\u578b\u662f\u5d4c\u5165\u7684\u3002\u8bf7\u6ce8\u610f\uff0c\u90a3\u91cc\u6ca1\u6709\u4efb\u4f55 json<\/code> \u6807\u7b7e\u3002\u5d4c\u5165\u5f0f\u7ed3\u6784\uff0c\u81f3\u5c11\u5c31\u89e3\u7ec4\u800c\u8a00\uff0c\u662f payload<\/code> \u7ed3\u6784\u7684\u4e00\u90e8\u5206\u3002\u56e0\u6b64\uff0c\u8be5\u7c7b\u578b\u7684\u6240\u6709\u5bfc\u51fa\u5b57\u6bb5\u90fd\u5c06\u76f4\u63a5\u89e3\u7ec4\u5230\u7ed3\u6784\u4e2d\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u89e3\u6790\u5305\u88c5\u7684json\u5bf9\u8c61\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208133","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208133"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208133\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}