go 读取数据库所有表数据显示到网页(便于测试时看)
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1 package Network 2 3 import ( 4 "SQL/myDB" 5 "database/sql" 6 "logs" 7 "net/http" 8 ) 9 10 func dbPage(w http.ResponseWriter, req *http.Request) { 11 printRequestInfo(req) 12 w.Header().Set("Content-Type", "text/html;charset=utf-8") 13 w.Write([]byte(` 14 <!DOCTYPE html> 15 <html> 16 <head> 17 <title>数据库所有数据</title> 18 </head> 19 <body> 20 `)) 21 w.Write([]byte(` 22 <a href="\setData?page=resetDB"><h1>重置数据</h1></a> 23 <a href="\setData?page=copyDB"><h1>复制数据</h1></a> 24 `)) 25 defer w.Write([]byte(` 26 </body> 27 </html> 28 `)) 29 w.Write([]byte(` 30 <h1>以下是数据库每个表前一百条，方便你们接口联调</h1> 31 `)) 32 db, err := myDB.GetDB() 33 if err != nil { 34 w.Write([]byte("<p>" + err.Error() + "</p>")) 35 return 36 } 37 38 description := []string{ 39 `1.objects(id int64 pk,nickname string,iconURL string,isUser bool,custom jsonb) 40 `, `2.users(id int64 fk pk,account string unique,password string,isManager bool) 41 `, `3.groups(id int64 fk pk,createtime time) 42 `, `4.members(groupID int64 fk,userID int64 fk,pk(groupID,userID)) 43 `, `5.messages(id int64 pk,content string,sender int64 fk,receiver int64 fk,createTime time) 44 `, `6.sessions(senderID int64 fk,receiverID int64 fk,lastMsgID int64 fk,pk(senderID,receiverID))； 45 `, 46 } 47 Sql := []string{ 48 `select * from objects 49 `, `select * from users 50 `, `select * from groups 51 `, `select * from members 52 `, `select * from messages 53 `, `select * from sessions 54 `, 55 } 56 for idx := 0; idx < len(Sql); idx++ { 57 w.Write([]byte("<h2>" + description[idx] + "</h2>")) 58 err := showData(w, db, Sql[idx]) 59 if err != nil { 60 logs.Print("dbPage error:", err.Error()) 61 return 62 } 63 } 64 } 65 66 func showData(w http.ResponseWriter, db *sql.DB, Sql string) error { 67 Sql += " limit 100" 68 rows, err := db.Query(Sql) 69 if err != nil { 70 w.Write([]byte("<p>" + err.Error() + "</p>")) 71 return err 72 } 73 defer rows.Close() 74 75 w.Write([]byte(` 76 <table border="1"> 77 <tr> 78 `)) 79 defer w.Write([]byte(` 80 </tr> 81 </table> `)) 82 83 cols, err := rows.Columns() 84 if err != nil { 85 w.Write([]byte(err.Error())) 86 return err 87 } 88 for _, val := range cols { 89 w.Write([]byte("<th>" + val + "</th>")) 90 } 91 92 return htmlOutputRows(w, len(cols), rows) 93 } 94 func htmlOutputRows(w http.ResponseWriter, colNum int, rows *sql.Rows) error { 95 str := make([][]byte, colNum) 96 for rows.Next() { 97 w.Write([]byte(` <tr>`)) 98 args := make([]interface{}, 0) 99 for idx := 0; idx < colNum; idx++ { 100 args = append(args, &str[idx]) 101 } 102 err := rows.Scan(args...) 103 if err != nil { 104 w.Write([]byte(err.Error())) 105 return err 106 } 107 for _, val := range str { 108 w.Write([]byte("<td>" + string(val) + "</td>")) 109 } 110 w.Write([]byte("</tr>")) 111 } 112 return nil 113 }
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