From 4358672226259c6a505f8e6641748b0c70850358 Mon Sep 17 00:00:00 2001
From: lvxin <lvxin0315@613.com>
Date: Sun, 30 Sep 2018 11:27:51 +0800
Subject: [PATCH] golang-api demo

---
 golang/README.md |   7 ++++
 golang/test.go   | 102 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 109 insertions(+)
 create mode 100644 golang/README.md
 create mode 100644 golang/test.go

diff --git a/golang/README.md b/golang/README.md
new file mode 100644
index 0000000..5464cbb
--- /dev/null
+++ b/golang/README.md
@@ -0,0 +1,7 @@
+# Usage:
+
+Do:
+```
+cd api-examples
+go run golang/test.go images/algebra.jpg
+```
diff --git a/golang/test.go b/golang/test.go
new file mode 100644
index 0000000..5958d73
--- /dev/null
+++ b/golang/test.go
@@ -0,0 +1,102 @@
+package main
+
+import (
+	"net/http"
+	"encoding/json"
+	"strings"
+	"io/ioutil"
+	"fmt"
+	"os"
+	"encoding/base64"
+	"bytes"
+)
+
+type MathpixV3LatexParam struct {
+	Src     string   `json:"src"`
+	Formats []string `json:"formats"`
+	Url     string   `json:"url"`
+}
+
+type DetectionMap struct {
+	ContainsChart   int     `json:"contains_chart"`
+	ContainsDiagram float32 `json:"contains_diagram"`
+	ContainsGraph   int     `json:"contains_graph"`
+	ContainsTable   int     `json:"contains_table"`
+	IsBlank         float32 `json:"is_blank"`
+	IsInverted      int     `json:"is_inverted"`
+	IsNotMath       float32 `json:"is_not_math"`
+	IsPrinted       float32 `json:"is_printed"`
+}
+
+type Position struct {
+	Height   int `json:"height"`
+	TopLeftX int `json:"top_left_x"`
+	TopLeftY int `json:"top_left_y"`
+	Width    int `json:"width"`
+}
+
+type MathpixV3LatexResult struct {
+	DetectionList       []string     `json:"detection_list"`
+	DetectionMap        DetectionMap `json:"detection_map"`
+	Error               string       `json:"error"`
+	LatexConfidence     float64      `json:"latex_confidence"`
+	LatexConfidenceRate float64      `json:"latex_confidence_rate"`
+	LatexList           []string     `json:"latex_list"`
+	LatexNormal         string       `json:"latex_normal"`
+	LatexStyled         string       `json:"latex_styled"`
+	Position            Position     `json:"position"`
+}
+
+func (mathpixV3LatexResult *MathpixV3LatexResult) String() string {
+	b, err := json.Marshal(*mathpixV3LatexResult)
+	if err != nil {
+		return fmt.Sprintf("%+v", *mathpixV3LatexResult)
+	}
+	var out bytes.Buffer
+	err = json.Indent(&out, b, "", "    ")
+	if err != nil {
+		return fmt.Sprintf("%+v", *mathpixV3LatexResult)
+	}
+	return out.String()
+}
+
+func main() {
+	filePath := os.Args[1]
+	imageByte, err := ioutil.ReadFile(filePath)
+	if err != nil{
+		fmt.Println(err.Error())
+		return
+	}
+
+	mathpixV3LatexParam := new(MathpixV3LatexParam)
+	mathpixV3LatexParam.Src = "data:image/jpg;base64," + base64.URLEncoding.EncodeToString(imageByte)
+	mathpixV3LatexParam.Formats = []string{"latex_normal", "latex_styled"}
+
+	client := &http.Client{}
+	data, err := json.Marshal(mathpixV3LatexParam)
+	req, err := http.NewRequest("POST", "https://api.mathpix.com/v3/latex", strings.NewReader(string(data)))
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("app_id", "trial")
+	req.Header.Set("app_key", "34f1a4cea0eaca8540c95908b4dc84ab")
+	resp, err := client.Do(req)
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+
+	//fmt.Println(string(body))
+
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	mathpixV3LatexResult := new(MathpixV3LatexResult)
+	err = json.Unmarshal(body,&mathpixV3LatexResult)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	fmt.Println(mathpixV3LatexResult.String())
+}