英文:
Adding query parameters when using Gorilla mux
问题
我正在学习使用Go语言进行REST API开发，但是我无法弄清楚如何获取特定用户的文档。我的使用情况是一个典型的GET请求，可以获取切片中的所有文档。然而，我希望能够根据用户的ID仅获取属于该用户的文档，例如，ID为1的用户不应该能够获取属于ID为2的用户的文档。我该如何在gorilla mux中添加userID参数并获取所需的数据呢？
文档结构体：
type Document struct {
Id string `json:"id"`
DocName string `json:"documentName"`
DocOwner string `json:"documentOwner"`
UserID string `json:"userID"`
}
文档切片：
sampleDocuments = []Document{
{Id: "1", DocName: "身份证", DocOwner: "Beans", UserID: "1"},
{Id: "2", DocName: "驾驶证", DocOwner: "Kal", UserID: "2"},
{Id: "3", DocName: "飞行员执照", DocOwner: "Jay", UserID: "2"},
}
英文:
I'm learning REST API development with go and cant figure out how to go about getting user specific documents.
My use case is a typical get request that can fetch all the documents in a slice. However I want to be able to only fetch documents belonging to a user based on their ID such that a user of ID: 1 should not be able to get documents belonging to user of ID:2. How can I go about adding the userID parameters with gorilla mux and fetch desired data.
Document struct
type Document struct {
Id string `json:"id"`
DocName string `json:"documentName"`
DocOwner string `json:"documentOwner"`
UserID string `json:"userID"`
}
Documents slice
sampleDocuments = []Document{
{Id: "1", DocName: "Identity card", DocOwner: "Beans",UserID: "1"},
{Id: "2", DocName: "Drivers License", DocOwner: "Kal",UserID: "2"},
{Id: "3", DocName: "Pilots License", DocOwner: "Jay",UserID: "2"},
}
答案1
得分: 1
我成功解决了，如下所示：
// 根据用户ID获取用户的文档
func getDocuments(w http.ResponseWriter, r *http.Request) {
// 创建一个空的结构体来保存用户的文档
var userDocs []Document
vars := mux.Vars(r)
userid := vars["userID"]
// 使用用户ID进行筛选
for _, d := range sampleDocuments {
if d.UserID == userid {
userDocs = append(userDocs, d)
}
}
json.NewEncoder(w).Encode(userDocs)
}
请求的URL应该类似于：
"...../documents/{userID}"
请注意，这只是一个示例代码片段，其中使用了mux和json包来处理HTTP请求和JSON编码。你需要根据你的实际情况进行适当的修改和调整。
英文:
I managed to figure it out as demonstrated below.
//Get documents belonging to a user based on userID
func getDocuments(w http.ResponseWriter, r *http.Request) {
//Create an empty struct to hold users documents
var userDocs []Document
vars := mux.Vars(r)
userid := vars["userID"]
// filter using user id
for _, d := range sampleDocuments {
if d.UserID == userid {
userDocs = append(userDocs, d)
}
}
json.NewEncoder(w).Encode(userDocs)
}
Request url should look something like this:
"...../documents/{userID}"
答案2
得分: 0
以下是问题的标题中所述的如何使用查询参数。 Gorilla Mux不使用查询参数。
调用Request.FormValue方法来获取查询参数。使用参数的值进行过滤。
func documentHandler(w http.ResponseWriter, r *http.Request) {
var result []Document
id := r.FormValue("ID")
if id == "" {
// 当未指定用户ID时返回所有文档
result = sampleDocuments
} else {
// 使用用户ID进行过滤
for _, d := range sampleDocuments {
if d.UserID == id {
result = append(result, d)
}
}
}
json.NewEncoder(w).Encode(result)
}
英文:
Here's how to use a query parameter as stated in the title of the question. The Gorilla Mux does not play a role using query parameters.
Call the Request.FormValue method to get the query parameter. Filter using the value of the parameter.
func documentHandler(w http.ResponseWriter, r *http.Request) {
var result []Document
id := r.FormValue("ID")
if id == "" {
// Return all documents when no user id specified
result = sampleDocuments
} else {
// filter using user id
for _, d := range sampleDocuments {
if d.UserID == id {
result = append(result, d)
}
}
}
json.NewEncoder(w).Encode(result)
}
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