Upload 7 files

.gitignore

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+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work

Dockerfile

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+FROM golang:1.22 AS builder
+WORKDIR /go/src/github.com/missuo/FreeDuckDuckGo
+COPY main.go ./
+COPY go.mod ./
+COPY go.sum ./
+RUN go get -d -v ./
+RUN CGO_ENABLED=0 go build -a -installsuffix cgo -o FreeDuckDuckGo .
+
+FROM alpine:latest
+WORKDIR /app
+COPY --from=builder /go/src/github.com/missuo/FreeDuckDuckGo/FreeDuckDuckGo /app/FreeDuckDuckGo
+CMD ["/app/FreeDuckDuckGo"]

LICENSE

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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

compose.yaml

@@ -0,0 +1,6 @@
+services:
+  FreeDuckDuckGo:
+    image: ghcr.io/missuo/freeduckduckgo:latest
+    restart: always
+    ports:
+      - "3456:3456"

go.mod

@@ -0,0 +1,37 @@
+module github.com/missuo/FreeDuckDuckGo
+
+go 1.22.2
+
+require (
+	github.com/gin-contrib/cors v1.7.1
+	github.com/gin-gonic/gin v1.9.1
+)
+
+require (
+	github.com/bytedance/sonic v1.11.3 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d // indirect
+	github.com/chenzhuoyu/iasm v0.9.1 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.19.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
+	golang.org/x/arch v0.7.0 // indirect
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/net v0.22.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,102 @@
+github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
+github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
+github.com/bytedance/sonic v1.11.3 h1:jRN+yEjakWh8aK5FzrciUHG8OFXK+4/KrAX/ysEtHAA=
+github.com/bytedance/sonic v1.11.3/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
+github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
+github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
+github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d h1:77cEq6EriyTZ0g/qfRdp61a3Uu/AWrgIq2s0ClJV1g0=
+github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d/go.mod h1:8EPpVsBuRksnlj1mLy4AWzRNQYxauNi62uWcE3to6eA=
+github.com/chenzhuoyu/iasm v0.9.0/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
+github.com/chenzhuoyu/iasm v0.9.1 h1:tUHQJXo3NhBqw6s33wkGn9SP3bvrWLdlVIJ3hQBL7P0=
+github.com/chenzhuoyu/iasm v0.9.1/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
+github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
+github.com/gin-contrib/cors v1.7.1 h1:s9SIppU/rk8enVvkzwiC2VK3UZ/0NNGsWfUKvV55rqs=
+github.com/gin-contrib/cors v1.7.1/go.mod h1:n/Zj7B4xyrgk/cX1WCX2dkzFfaNm/xJb6oIUk7WTtps=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg=
+github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU=
+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.19.0 h1:ol+5Fu+cSq9JD7SoSqe04GMI92cbn0+wvQ3bZ8b/AU4=
+github.com/go-playground/validator/v10 v10.19.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM=
+github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
+github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
+github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
+github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
+github.com/klauspost/cpuid/v2 v2.2.7 h1:ZWSB3igEs+d0qvnxR/ZBzXVmxkgt8DdzP6m9pfuVLDM=
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+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
+rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

main.go

@@ -0,0 +1,285 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"io"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+type OpenAIRequest struct {
+	Model    string `json:"model"`
+	Messages []struct {
+		Role    string `json:"role"`
+		Content string `json:"content"`
+	} `json:"messages"`
+	Stream bool `json:"stream"`
+}
+
+type OpenAIResponse struct {
+	ID      string         `json:"id"`
+	Object  string         `json:"object"`
+	Created int64          `json:"created"`
+	Model   string         `json:"model"`
+	Choices []OpenAIChoice `json:"choices"`
+}
+
+type OpenAIChoice struct {
+	Index        int         `json:"index"`
+	Delta        OpenAIDelta `json:"delta"`
+	Logprobs     interface{} `json:"logprobs"`
+	FinishReason *string     `json:"finish_reason"`
+}
+
+type OpenAIDelta struct {
+	Role    string `json:"role,omitempty"`
+	Content string `json:"content,omitempty"`
+}
+
+type OpenAINonStreamResponse struct {
+	ID      string                  `json:"id"`
+	Object  string                  `json:"object"`
+	Created int64                   `json:"created"`
+	Model   string                  `json:"model"`
+	Choices []OpenAINonStreamChoice `json:"choices"`
+}
+
+type OpenAINonStreamChoice struct {
+	Index        int         `json:"index"`
+	Message      OpenAIDelta `json:"message"`
+	FinishReason *string     `json:"finish_reason"`
+}
+
+type DuckDuckGoResponse struct {
+	Role    string `json:"role"`
+	Message string `json:"message"`
+	Created int64  `json:"created"`
+	ID      string `json:"id"`
+	Action  string `json:"action"`
+	Model   string `json:"model"`
+}
+
+func chatWithDuckDuckGo(c *gin.Context, messages []struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}, stream bool) {
+	userAgent := "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0"
+	headers := map[string]string{
+		"User-Agent":      userAgent,
+		"Accept":          "text/event-stream",
+		"Accept-Language": "de,en-US;q=0.7,en;q=0.3",
+		"Accept-Encoding": "gzip, deflate, br",
+		"Referer":         "https://duckduckgo.com/",
+		"Content-Type":    "application/json",
+		"Origin":          "https://duckduckgo.com",
+		"Connection":      "keep-alive",
+		"Cookie":          "dcm=1",
+		"Sec-Fetch-Dest":  "empty",
+		"Sec-Fetch-Mode":  "cors",
+		"Sec-Fetch-Site":  "same-origin",
+		"Pragma":          "no-cache",
+		"TE":              "trailers",
+	}
+
+	statusURL := "https://duckduckgo.com/duckchat/v1/status"
+	chatURL := "https://duckduckgo.com/duckchat/v1/chat"
+
+	// get vqd_4
+	req, err := http.NewRequest("GET", statusURL, nil)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	req.Header.Set("x-vqd-accept", "1")
+	for key, value := range headers {
+		req.Header.Set(key, value)
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	defer resp.Body.Close()
+
+	vqd4 := resp.Header.Get("x-vqd-4")
+
+	payload := map[string]interface{}{
+		"model":    "gpt-3.5-turbo-0125",
+		"messages": messages,
+	}
+
+	payloadBytes, err := json.Marshal(payload)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	req, err = http.NewRequest("POST", chatURL, bytes.NewBuffer(payloadBytes))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	req.Header.Set("x-vqd-4", vqd4)
+	for key, value := range headers {
+		req.Header.Set(key, value)
+	}
+
+	resp, err = http.DefaultClient.Do(req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	defer resp.Body.Close()
+
+	reader := bufio.NewReader(resp.Body)
+	c.Header("Content-Type", "text/event-stream")
+	c.Header("Cache-Control", "no-cache")
+	c.Header("Connection", "keep-alive")
+	c.Header("Transfer-Encoding", "chunked")
+
+	flusher, _ := c.Writer.(http.Flusher)
+
+	var response OpenAIResponse
+	var nonStreamResponse OpenAINonStreamResponse
+	response.Choices = make([]OpenAIChoice, 1)
+	nonStreamResponse.Choices = make([]OpenAINonStreamChoice, 1)
+
+	var responseContent string
+
+	for {
+		line, err := reader.ReadBytes('\n')
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+
+		if bytes.HasPrefix(line, []byte("data: ")) {
+			chunk := line[6:]
+
+			if bytes.HasPrefix(chunk, []byte("[DONE]")) {
+				if !stream {
+					nonStreamResponse.Choices[0].Message.Content = responseContent
+					nonStreamResponse.Choices[0].Message.Role = "assistant"
+					nonStreamResponse.Choices[0].FinishReason = new(string)
+					*nonStreamResponse.Choices[0].FinishReason = "stop"
+					c.JSON(http.StatusOK, nonStreamResponse)
+					return
+				} else {
+					stopData := OpenAIResponse{
+						ID:      "chatcmpl-9HOzx2PhnYCLPxQ3Dpa2OKoqR2lgl",
+						Object:  "chat.completion",
+						Created: 1713934697,
+						Model:   "gpt-3.5-turbo-0125",
+						Choices: []OpenAIChoice{
+							{
+								Index:        0,
+								FinishReason: stringPtr("stop"),
+							},
+						},
+					}
+					stopDataBytes, _ := json.Marshal(stopData)
+					c.Data(http.StatusOK, "application/json", []byte("data: "))
+					c.Data(http.StatusOK, "application/json", stopDataBytes)
+					c.Data(http.StatusOK, "application/json", []byte("\n\n"))
+					flusher.Flush()
+
+					c.Data(http.StatusOK, "application/json", []byte("data: [DONE]\n\n"))
+					flusher.Flush()
+					return
+				}
+			}
+
+			var data DuckDuckGoResponse
+			decoder := json.NewDecoder(bytes.NewReader(chunk))
+			decoder.UseNumber()
+			err = decoder.Decode(&data)
+			if err != nil {
+				c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+				return
+			}
+
+			response.ID = data.ID
+			response.Object = "chat.completion"
+			response.Created = data.Created
+			response.Model = data.Model
+			nonStreamResponse.ID = data.ID
+			nonStreamResponse.Object = "chat.completion"
+			nonStreamResponse.Created = data.Created
+			nonStreamResponse.Model = data.Model
+			responseContent += data.Message
+
+			if stream {
+				response.Choices[0].Delta.Content = data.Message
+
+				responseBytes, err := json.Marshal(response)
+				if err != nil {
+					c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+					return
+				}
+
+				c.Data(http.StatusOK, "application/json", append(append([]byte("data: "), responseBytes...), []byte("\n\n")...))
+				flusher.Flush()
+
+				response.Choices[0].Delta.Content = ""
+			}
+
+		}
+	}
+}
+
+func stringPtr(s string) *string {
+	return &s
+}
+
+func main() {
+	gin.SetMode(gin.ReleaseMode)
+	r := gin.Default()
+
+	r.GET("/", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{
+			"message": "Hello! Thank you for using FreeDuckDuckGo. Made by Vincent Yang. Repo: https://github.com/missuo/FreeDuckDuckGo",
+		})
+	})
+
+	r.POST("/v1/chat/completions", func(c *gin.Context) {
+		var req OpenAIRequest
+		if err := c.ShouldBindJSON(&req); err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+		// only support user role
+		for i := range req.Messages {
+			if req.Messages[i].Role == "system" {
+				req.Messages[i].Role = "user"
+			}
+		}
+		// set model to gpt-3.5-turbo-0125
+		req.Model = "gpt-3.5-turbo-0125"
+		chatWithDuckDuckGo(c, req.Messages, req.Stream)
+	})
+
+	r.GET("/v1/models", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{
+			"object": "list",
+			"data": []gin.H{
+				{
+					"id":       "gpt-3.5-turbo-0125",
+					"object":   "model",
+					"created":  1692901427,
+					"owned_by": "system",
+				},
+			},
+		})
+	})
+
+	r.Run(":3456")
+}