我不知道如何在Golang中使用来自Flutter的数据。

huangapple
go评论136阅读模式
英文:

I don't know how to use data sent from flutter in golang

问题

以下是将数据从Flutter传输到Golang的逻辑代码：

  1. package main
  3. import (
  4. 	"encoding/json"
  5. 	"fmt"
  6. 	"io/ioutil"
  7. 	"mime/multipart"
  8. 	"net/http"
  9. 	"os"
  10. )
  12. type Pages struct {
  13. 	Order       uint     `json:"order"`
  14. 	Description string   `json:"description"`
  15. 	Images      []string `json:"images"`
  16. }
  18. type Tags struct {
  19. 	TagId   uint   `json:"id"`
  20. 	TagName string `json:"tag_name"`
  21. }
  23. type GetData struct {
  24. 	Title    string `json:"title"`
  25. 	Date     string `json:"date"`
  26. 	Location string `json:"location"`
  27. 	Address  string `json:"address"`
  28. 	Tags     []Tags `json:"tag_list"`
  29. 	Pages    []Pages `json:"pages"`
  30. }
  32. func handleRequest(w http.ResponseWriter, r *http.Request) {
  33. 	body, err := ioutil.ReadAll(r.Body)
  34. 	if err != nil {
  35. 		http.Error(w, err.Error(), http.StatusInternalServerError)
  36. 		return
  37. 	}
  39. 	var data GetData
  40. 	err = json.Unmarshal(body, &data)
  41. 	if err != nil {
  42. 		http.Error(w, err.Error(), http.StatusBadRequest)
  43. 		return
  44. 	}
  46. 	// 处理接收到的数据
  47. 	fmt.Println("Received Data:")
  48. 	fmt.Println("Title:", data.Title)
  49. 	fmt.Println("Date:", data.Date)
  50. 	fmt.Println("Location:", data.Location)
  51. 	fmt.Println("Address:", data.Address)
  52. 	fmt.Println("Tags:")
  53. 	for _, tag := range data.Tags {
  54. 		fmt.Println("Tag ID:", tag.TagId)
  55. 		fmt.Println("Tag Name:", tag.TagName)
  56. 	}
  57. 	fmt.Println("Pages:")
  58. 	for _, page := range data.Pages {
  59. 		fmt.Println("Order:", page.Order)
  60. 		fmt.Println("Description:", page.Description)
  61. 		fmt.Println("Images:")
  62. 		for _, image := range page.Images {
  63. 			fmt.Println("Image Path:", image)
  64. 			// 将文件数据保存到S3或其他存储服务
  65. 			// 这里只是示例，你需要根据实际情况进行处理
  66. 			saveToS3(image)
  67. 		}
  68. 	}
  70. 	// 返回响应
  71. 	w.WriteHeader(http.StatusOK)
  72. 	w.Write([]byte("Data received successfully"))
  73. }
  75. func saveToS3(filePath string) {
  76. 	// 将文件保存到S3的逻辑代码
  77. 	// 这里只是示例，你需要根据实际情况进行处理
  78. 	fmt.Println("Saving file to S3:", filePath)
  79. }
  81. func main() {
  82. 	http.HandleFunc("/test", handleRequest)
  83. 	http.ListenAndServe(":8080", nil)
  84. }

上述代码是一个简单的示例，它接收来自Flutter的数据并进行处理。你可以根据实际需求修改处理数据的逻辑，比如将文件保存到S3或其他存储服务中。请注意，这只是一个示例，你需要根据实际情况进行适当的修改和处理。

英文: 
  1.         var request = http.MultipartRequest('post', Uri.parse(TravelingUrl.testAddress + '/test'));
  2. request.fields['title'] = createDiary.value.title as String;
  3. request.fields['tag_list'] = createDiary.value.tagList.toString();
  4. request.fields['date'] = createDiary.value.date.toString();
  5. for (var i = 0; i < createDiary.value.pages!.length; i++) {
  6. Pages _tempPage = createDiary.value.pages![i];
  7. request.fields['pages[$i][order]'] = jsonEncode(_tempPage.order);
  8. request.fields['pages[$i][description]'] =
  9. jsonEncode(_tempPage.description);
  10. for (var ii = 0; ii < _tempPage.images!.length; ii++) {
  11. request.files.add(await http.MultipartFile.fromPath(
  12. 'pages[$i][images]', _tempPage.images![ii]));
  13. }
  14. }
  15. var response = await request.send();

The code above is the logic to transfer data from flutter to golang.

and i want use in golang what recived data from flutter.

i defined struct at golang like this

  1.     type _pages struct {
  2. Order       uint             `json:"order"`
  3. Description string           `json:"description"`
  4. Images      []multipart.File `json:"images"`
  5. }
  6. type _tags struct {
  7. TagId   uint   `json:"id"`
  8. TagName string `json:"tag_name"`
  9. }
  10. type _getData struct {
  11. Title    string `json:"title"`
  12. Date     string `json:"date"`
  13. Location string `json:"location"`
  14. Address  string `json:"address"`
  15. _tags
  16. _pages
  17. }

I'm not familiar with golang, please help, can I see a simple example of getting data and using it?

There is file data in the array variable, I want to receive the data and save this file data to s3.

答案1

得分: 1

调用Request.FormValue和Request.FormFile来获取值和文件。

对于类似数组的字段，生成与客户端相同的字符串参数名称。循环遍历数组索引，并在页面没有该字段时跳出循环。

  1. title := r.FormValue("title")
  2. tagList := r.FormValue("tag_list")
  3. ...
  4. for i := 0; i < maxPossiblePages; i++ {
  5.    if _, ok := r.Form[fmt.Sprintf("pages[%d][order]", i)]; !ok {
  6.         break;
  7.    }
  8.    pageOrder := r.FormValue(fmt.Sprintf("pages[%d][order]", i))
  9.    pageDescription := r.FormValue(fmt.Sprintf("pages[%d][description]", i))
  10.    ...
  11. }
英文:

Call Request.FormValue and Request.FormFile to get the values and files.

For the array-like fields, generate string parameter names as the client does. Loop though array indices and break when there is no field for the page.

  1. title := r.FormValue(&quot;title&quot;)
  2. tagList := r.FormValue(&quot;tag_list&quot;)
  3. ...
  4. for i := 0; i &lt; maxPossiblePages; i++ { 
  5. if _, ok := r.Form[fmt.Sprintf(&quot;pages[%d][order]&quot;, i)]; !ok { 
  6. break; 
  7. } 
  8. pageOrder := r.FormValue(fmt.Sprintf(&quot;pages[%d][order]&quot;, i))
  9. pageDescription := r.FormValue(fmt.Sprintf(&quot;pages[%d][description]&quot;, i))
  10. ...
  11. }

huangapple
  • 本文由 发表于 2021年9月16日 13:36:08
  • 转载请务必保留本文链接：https://go.coder-hub.com/69202845.html
  • amazon-web-services
  • dart
  • flutter
  • go
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