避免使用 groovy 的 HTTPBuilder/RESTClient 将某些值转换为 JSON

Avoid converting some values to JSON with groovy's HTTPBuilder/RESTClient

我正在尝试使用 groovy 的 RESTClient 将设计文档添加到 CouchDB 数据库。 CouchDB 要求设计文档中的函数(例如视图中的 map/reduce 函数)是字符串而不是实际的 JSON Function 对象。不幸的是,HTTPBuilder 自动将字符串解析为 JSON Function 而不是将其保留为 String。这是一个简单的例子:

import groovyx.net.http.ContentType
import groovyx.net.http.RESTClient

RESTClient restClient = new RESTClient('http://localhost:5984', ContentType.JSON)
def databaseName = 'sampledb'
restClient.put path: "/${databaseName}" // Create the sample DB

def document = [
  language: 'javascript',
  views: [
    sample_view: [
      map: 'function(doc) { emit(doc._id, doc); }'
    ]
  ]
]
// CouchDB returns 400 Bad Request at the following line
restClient.put path: "/${databaseName}/_design/sample_design", body: document

这里是CouchDB日志的相关部分(注意没有引用map函数):

[Fri, 17 Mar 2017 16:32:49 GMT] [error] [<0.18637.0>] attempted upload of invalid JSON (set log_level to debug to log it)
[Fri, 17 Mar 2017 16:32:49 GMT] [debug] [<0.18637.0>] Invalid JSON: {{error,
                                      {56,
                                       "lexical error: invalid string in json text.\n"}},
                                     <<"{\"language\":\"javascript\",\"views\":{\"sample_view\":{\"map\":function(doc) { emit(doc._id, doc); }}}}">>}
[Fri, 17 Mar 2017 16:32:49 GMT] [info] [<0.18637.0>] 127.0.0.1 - - PUT /sampledb/_design/sample_design 400
[Fri, 17 Mar 2017 16:32:49 GMT] [debug] [<0.18637.0>] httpd 400 error response:
 {"error":"bad_request","reason":"invalid_json"}

我试过在字符串中嵌入引号(即 map: '"function(doc) { emit(doc._id, doc); }"';这将值保留为字符串,但它也保留了嵌入的引号,这会阻止 CouchDB 执行该函数。有谁知道如何在转换为 JSON?

期间,我可以将特定值保留为纯字符串

我终于找到了我自己问题的答案。我想了大约一年的简单解决方案是将设计文档定义为 String 而不是 Map。问题中的示例脚本的以下轻微修改按预期工作:

import groovyx.net.http.ContentType
import groovyx.net.http.RESTClient

RESTClient restClient = new RESTClient('http://localhost:5984', ContentType.JSON)
def databaseName = 'sampledb'
restClient.put path: "/${databaseName}" // Create the sample DB

def document = /
{
  "language": "javascript",
  "views": {
    "sample_view": {
      "map": "function(doc) { emit(doc._id, doc); }"
    }
  }
}
/
// CouchDB no longer returns 400 Bad Request at the following line and now correctly parses the
// design document!
restClient.put path: "/${databaseName}/_design/sample_design", body: document