英文:
Searching Elasticsearch with Golang
问题
我是你的中文翻译助手，以下是翻译好的内容：
我对Go语言还比较新，目前我正在尝试在Elasticsearch中搜索记录，下面是我创建的基本代码，到目前为止，我能够执行简单的GET请求"http://10.132.0.13:9200/"，并且返回了预期的结果。然而，一旦我尝试运行稍微复杂一些的GET请求，它就会失败。
以下是我目前创建的代码：
package main
import (
"fmt"
"io/ioutil"
"net/http"
)
func main() {
//request, err := http.Get(`http://10.132.0.13:9200/`) // 这只是返回测试页面
request, err := http.Get(`http://10.132.0.13:9200/database-*/_search?pretty -d { "query": { "match": {"_all": "searchterm"}}}`)
if err != nil {
// 错误处理
}
defer request.Body.Close()
body, err := ioutil.ReadAll(request.Body)
fmt.Println(string(body))
}
我可以使用curl -xget直接查询索引，并返回预期的结果。
是否有办法在Go语言中实现类似的curl -xget功能？
英文:
I'm relatively new to Go and I'm currently trying to search records in elastic search, below is the basic code I have created, so far I'm able to perform a simple GET request "http://10.132.0.13:9200/" and results are returned as expected. However, once I try to run a slightly more complex GET request it fails.
Below is the code I have created so far.
package main
import (
"fmt"
"io/ioutil"
"net/http"
)
func main() {
//request, err := http.Get(`http://10.132.0.13:9200/`) // this just returns the test page
request, err := http.Get(`http://10.132.0.13:9200/database-*/_search?pretty -d { "query": { "match": {"_all": "searchterm"}}}`)
if err != nil {
//error
}
defer request.Body.Close()
body, err := ioutil.ReadAll(request.Body)
fmt.Println(string(body))
}
I can query the index directly with the use of curl -xget and it returns the expected results
Is there a way to implement a similar curl -xget in golang?
答案1
得分: 1
你可以尝试像这样做。你正在提交 JSON 数据（或表单数据），这意味着你可能应该使用 POST 或 PUT 方法。XGET 覆盖了 GET 请求的默认行为。使用 curl 切换到 POST 方法，看看你的查询是否仍然有效。
package main
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
)
func main() {
query := []byte(`{"query": { "match": {"_all": "searchterm"}}}`)
req, err := http.NewRequest("POST", "http://10.132.0.13:9200/database-*/_search?pretty", bytes.NewBuffer(query))
if err != nil {
panic(err)
}
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
panic(err)
}
fmt.Println(string(body))
}
希望对你有帮助！
英文:
You can try something like this. Your submitting JSON data (or form data), which means that you should probably be using a POST or a PUT. XGET overrides the default behavior of a GET request. Using curl switch over to a POST and see if your query still works.
package main
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
)
func main() {
query := []byte(`{"query": { "match": {"_all": "searchterm"}}}`)
req, err := http.NewRequest("POST", "http://10.132.0.13:9200/database-*/_search?pretty", bytes.NewBuffer(query))
if err != nil {
panic(err)
}
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
panic(err)
}
fmt.Println(string(body))
}
答案2
得分: 1
要将请求体数据传递给GET请求，您需要稍微修改请求对象的构造方式：
requestBody := `{ "query": { "match": {"_all": "searchterm"}}}`
// 将字符串转换为Reader
requestReader := bytes.NewReader([]byte(requestBody))
// 构造请求对象
request, err := http.NewRequest("GET", `http://10.132.0.13:9200/database-*/_search?pretty`, requestReader)
// 使用默认客户端发送请求
response, err := http.DefaultClient.Do(request)
if err != nil {
panic(err)
}
defer response.Body.Close()
body, err := ioutil.ReadAll(response.Body)
fmt.Println(string(body))
如果您需要使用更复杂的Elastic查询，可能更合适的是使用Go客户端，例如：http://olivere.github.io/elastic/
但根据您的用例，使用http.Request更好。
英文:
To pass body data to a get request you have to construct your request object a bit differently:
requestBody := `{ "query": { "match": {"_all": "searchterm"}}}`
// convert string to reader
requestReader := bytes.NewReader([]byte(requestBody))
// construct the request object
request, err := http.NewRequest("GET", `http://10.132.0.13:9200/database-*/_search?pretty`, requestReader)
// send the request using default client
response, err := http.DefaultClient.Do(request)
if err != nil {
panic(err)
}
defer response.Body.Close()
body, err := ioutil.ReadAll(response.Body)
fmt.Println(string(body))
If you have to use more complex elastic queries it might make sense to use a go client like for example: http://olivere.github.io/elastic/
But depending on your usecase, using http.Request is better.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论