/
uploadpic.go
362 lines (311 loc) · 10.1 KB
/
uploadpic.go
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package server
import (
"bytes"
"context"
"crypto/md5"
"encoding/base64"
"encoding/hex"
"errors"
"fmt"
"image"
_ "image/gif"
_ "image/jpeg"
_ "image/png"
"net/http"
"os"
"strings"
"time"
"github.com/gin-gonic/gin"
"github.com/hoshinonyaruko/gensokyo/config"
"github.com/hoshinonyaruko/gensokyo/idmap"
"github.com/hoshinonyaruko/gensokyo/images"
"github.com/hoshinonyaruko/gensokyo/mylog"
"github.com/tencent-connect/botgo/dto"
"github.com/tencent-connect/botgo/openapi"
)
const (
MaximumImageSize = 10 * 1024 * 1024
AllowedUploadsPerMinute = 100
RequestInterval = time.Minute
)
type RateLimiter struct {
Counts map[string][]time.Time
}
// 频率限制器
func NewRateLimiter() *RateLimiter {
return &RateLimiter{
Counts: make(map[string][]time.Time),
}
}
// 闭包,网页后端,图床逻辑,基于gin和www静态文件的简易图床
func UploadBase64ImageHandler(rateLimiter *RateLimiter) gin.HandlerFunc {
return func(c *gin.Context) {
ipAddress := c.ClientIP()
if !rateLimiter.CheckAndUpdateRateLimit(ipAddress) {
c.JSON(http.StatusTooManyRequests, gin.H{"error": "rate limit exceeded"})
return
}
base64Image := c.PostForm("base64Image")
// Print the length of the received base64 data
mylog.Println("Received base64 data length:", len(base64Image), "characters")
imageBytes, err := base64.StdEncoding.DecodeString(base64Image)
if err != nil {
mylog.Println("Error while decoding base64:", err) // Print error while decoding
c.JSON(http.StatusBadRequest, gin.H{"error": "invalid base64 data"})
return
}
imageFormat, err := getImageFormat(imageBytes)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "undefined picture format1"})
return
}
fileExt := getFileExtensionFromImageFormat(imageFormat)
if fileExt == "" {
c.JSON(http.StatusBadRequest, gin.H{"error": "unsupported image format2"})
return
}
fileName := getFileMd5(imageBytes) + "." + fileExt
directoryPath := "./channel_temp/"
savePath := directoryPath + fileName
// Create the directory if it doesn't exist
err = os.MkdirAll(directoryPath, 0755)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "error creating directory"})
return
}
//如果文件存在则跳过
if _, err := os.Stat(savePath); os.IsNotExist(err) {
err = os.WriteFile(savePath, imageBytes, 0644)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "error saving file"})
return
}
} else {
mylog.Println("File already exists, skipping save.")
}
var serverPort string
serverAddress := config.GetServer_dir()
frpport := config.GetFrpPort()
if frpport != "0" {
serverPort = frpport
} else {
serverPort = config.GetPortValue()
}
if serverAddress == "" {
// Handle the case where the server address is not configured
c.JSON(http.StatusInternalServerError, gin.H{"error": "server address is not configured"})
return
}
// 根据serverPort确定协议
protocol := "http"
if serverPort == "443" {
protocol = "https"
}
stun, err := idmap.ReadConfigv2("stun", "addr")
var imageURL string
if err == nil && stun != "" {
imageURL = fmt.Sprintf("http://%s/channel_temp/%s", stun, fileName)
} else {
imageURL = fmt.Sprintf("%s://%s:%s/channel_temp/%s", protocol, serverAddress, serverPort, fileName)
}
c.JSON(http.StatusOK, gin.H{"url": imageURL})
}
}
func UploadBase64ImageHandlerV2(rateLimiter *RateLimiter, apiv2 openapi.OpenAPI) gin.HandlerFunc {
return func(c *gin.Context) {
ipAddress := c.ClientIP()
if !rateLimiter.CheckAndUpdateRateLimit(ipAddress) {
c.JSON(http.StatusTooManyRequests, gin.H{"error": "rate limit exceeded"})
return
}
// 从请求中获取必要的参数
base64Image := c.PostForm("base64Image")
imageUrl := c.PostForm("url") // 新增的url参数
msgid := c.DefaultPostForm("msgid", "")
groupID := c.PostForm("groupID")
if groupID == "" {
c.JSON(http.StatusBadRequest, gin.H{"error": "groupID is required"})
return
}
var imageURL string
var groupid uint64
var width, height uint32
var err error
// 根据参数调用不同的处理逻辑
if base64Image != "" {
imageURL, groupid, width, height, err = images.UploadBase64ImageToServer(msgid, base64Image, groupID, apiv2)
} else if imageUrl != "" {
imageURL, groupid, width, height, err = images.TransferUrlToServerUrl(msgid, imageUrl, groupID, apiv2)
} else {
c.JSON(http.StatusBadRequest, gin.H{"error": "either base64Image or url is required"})
return
}
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
return
}
// 如果上传成功,则返回图片的URL,群组ID,宽度和高度
c.JSON(http.StatusOK, gin.H{
"url": imageURL,
"groupid": groupid,
"width": width,
"height": height,
})
}
}
func UploadBase64ImageHandlerV3(rateLimiter *RateLimiter, apiv1 openapi.OpenAPI) gin.HandlerFunc {
return func(c *gin.Context) {
ipAddress := c.ClientIP()
if !rateLimiter.CheckAndUpdateRateLimit(ipAddress) {
c.JSON(http.StatusTooManyRequests, gin.H{"error": "rate limit exceeded"})
return
}
base64Image := c.PostForm("base64Image")
channelID := c.PostForm("channelID")
if channelID == "" {
c.JSON(http.StatusBadRequest, gin.H{"error": "channelID is required"})
return
}
fileImageData, err := base64.StdEncoding.DecodeString(base64Image)
if err != nil {
mylog.Printf("Base64 解码失败: %v", err)
return
}
// 压缩 只有设置了阈值才会压缩
compressedData, err := images.CompressSingleImage(fileImageData)
if err != nil {
mylog.Printf("Error compressing image: %v", err)
return
}
newMessage := &dto.MessageToCreate{
Content: "",
MsgID: "1000",
MsgType: 0,
Timestamp: time.Now().Unix(),
}
if _, err = apiv1.PostMessageMultipart(context.TODO(), channelID, newMessage, compressedData); err != nil {
mylog.Printf("使用multipart发送图文信息失败: %v message_id %v", err, 1000)
return
}
// 计算压缩数据的MD5值
md5Hash := md5.Sum(compressedData)
md5String := strings.ToUpper(hex.EncodeToString(md5Hash[:]))
imageURL := fmt.Sprintf("https://gchat.qpic.cn/qmeetpic/0/0-0-%s/0", md5String)
// 获取图片宽高
height, width, err := images.GetImageDimensions(imageURL)
if err != nil {
mylog.Printf("获取图片宽高出错: %v", err)
return
}
c.JSON(http.StatusOK, gin.H{
"url": imageURL,
"channelID": channelID,
"width": width,
"height": height,
})
}
}
// 闭包,网页后端,语音床逻辑,基于gin和www静态文件的简易语音床
func UploadBase64RecordHandler(rateLimiter *RateLimiter) gin.HandlerFunc {
return func(c *gin.Context) {
ipAddress := c.ClientIP()
if !rateLimiter.CheckAndUpdateRateLimit(ipAddress) {
c.JSON(http.StatusTooManyRequests, gin.H{"error": "rate limit exceeded"})
return
}
base64REcord := c.PostForm("base64Record")
// Print the length of the received base64 data
mylog.Println("Received base64 data length:", len(base64REcord), "characters")
RecordBytes, err := base64.StdEncoding.DecodeString(base64REcord)
if err != nil {
mylog.Println("Error while decoding base64:", err) // Print error while decoding
c.JSON(http.StatusBadRequest, gin.H{"error": "invalid base64 data"})
return
}
fileName := getFileMd5(RecordBytes) + ".silk"
directoryPath := "./channel_temp/"
savePath := directoryPath + fileName
// Create the directory if it doesn't exist
err = os.MkdirAll(directoryPath, 0755)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "error creating directory"})
return
}
//如果文件存在则跳过
if _, err := os.Stat(savePath); os.IsNotExist(err) {
err = os.WriteFile(savePath, RecordBytes, 0644)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "error saving file"})
return
}
} else {
mylog.Println("File already exists, skipping save.")
}
serverAddress := config.GetServer_dir()
serverPort := config.GetPortValue()
if serverAddress == "" {
// Handle the case where the server address is not configured
c.JSON(http.StatusInternalServerError, gin.H{"error": "server address is not configured"})
return
}
// 根据serverPort确定协议
protocol := "http"
if serverPort == "443" {
protocol = "https"
}
imageURL := fmt.Sprintf("%s://%s:%s/channel_temp/%s", protocol, serverAddress, serverPort, fileName)
c.JSON(http.StatusOK, gin.H{"url": imageURL})
}
}
// 检查是否超过调用频率限制
func (rl *RateLimiter) CheckAndUpdateRateLimit(ipAddress string) bool {
// 获取 MaxRequests 的当前值
maxRequests := config.GetImageLimitB()
now := time.Now()
rl.Counts[ipAddress] = append(rl.Counts[ipAddress], now)
// Remove expired entries
for len(rl.Counts[ipAddress]) > 0 && now.Sub(rl.Counts[ipAddress][0]) > RequestInterval {
rl.Counts[ipAddress] = rl.Counts[ipAddress][1:]
}
return len(rl.Counts[ipAddress]) <= maxRequests
}
// 获取图片类型
func getImageFormat(data []byte) (format string, err error) {
// Print the size of the data to check if it's being read correctly
mylog.Println("Received data size:", len(data), "bytes")
_, format, err = image.DecodeConfig(bytes.NewReader(data))
if err != nil {
// Print additional error information
mylog.Println("Error while trying to decode image config:", err)
return "", fmt.Errorf("error decoding image config: %w", err)
}
// Print the detected format
mylog.Println("Detected image format:", format)
if format == "" {
return "", errors.New("undefined picture format")
}
return format, nil
}
// 判断并返回图片类型
func getFileExtensionFromImageFormat(format string) string {
switch format {
case "jpeg":
return "jpg"
case "gif":
return "gif"
case "png":
return "png"
default:
return ""
}
}
// 生成随机md5图片名,防止碰撞
func getFileMd5(base64file []byte) string {
md5Hash := md5.Sum(base64file)
return hex.EncodeToString(md5Hash[:])
}
func HandleIpupdate(c *gin.Context) {
reqParam := c.Query("addr")
idmap.WriteConfigv2("stun", "addr", reqParam)
c.JSON(http.StatusOK, gin.H{"addr": reqParam})
}