猜你想要这个：
╭─root@DESKTOP-OCDRD7Q ~
╰─# nc localhost 4040
{"get": "Sindh"}
[{"Covid_Positive":"1","Coivd_Performed":"1","Covid_Date":"1","Covid_Discharged":"1","Covid_Expired":"1","Covid_Region":"Sindh","Covid_Admitted":"1"}]
您应该做的只是修改您的 json 请求。
package main
import (
"bufio"
"encoding/csv"
"encoding/json"
"flag"
"fmt"
"io"
"log"
"net"
"os"
)
type CovidPatient struct {
Positive string `json:"Covid_Positive"`
Performed string `json:"Coivd_Performed"`
Date string `json:"Covid_Date"`
Discharged string `json:"Covid_Discharged"`
Expired string `json:"Covid_Expired"`
Region string `json:"Covid_Region"`
Admitted string `json:"Covid_Admitted"`
}
type DataRequest struct {
Get CovidPatient `json:"get"`
}
type DataError struct {
Error string `json:"Covid_error"`
}
func Load(path string) []CovidPatient {
table := make([]CovidPatient, 0)
var patient CovidPatient
file, err := os.Open(path)
if err != nil {
panic(err.Error())
}
defer file.Close()
reader := csv.NewReader(file)
csvData, err := reader.ReadAll()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
for _, row := range csvData {
patient.Positive = row[0]
patient.Performed = row[1]
patient.Date = row[2]
patient.Discharged = row[3]
patient.Expired = row[4]
patient.Region = row[5]
patient.Admitted = row[6]
table = append(table, patient)
}
return table
}
func Find(table []CovidPatient, filter CovidPatient) []CovidPatient {
result := make([]CovidPatient, 0)
log.Println(filter, table)
for _, cp := range table {
if filter.Positive == "" {
} else if filter.Positive != cp.Positive {
continue
}
if filter.Performed == "" {
} else if filter.Performed != cp.Performed {
continue
}
if filter.Date == "" {
} else if filter.Date != cp.Date {
continue
}
if filter.Discharged == "" {
} else if filter.Discharged != cp.Discharged {
continue
}
if filter.Expired == "" {
} else if filter.Expired != cp.Expired {
continue
}
if filter.Region == "" {
} else if filter.Region != cp.Region {
continue
}
if filter.Admitted == "" {
} else if filter.Admitted != cp.Admitted {
continue
}
result = append(result, cp)
}
return result
}
var (
patientsDetail = Load("./covid_final_data.csv")
)
func main() {
log.SetFlags(log.Lshortfile | log.Ltime)
var addr string
var network string
flag.StringVar(&addr, "e", ":4040", "service endpoint [ip addr or socket path]")
flag.StringVar(&network, "n", "tcp", "network protocol [tcp,unix]")
flag.Parse()
switch network {
case "tcp", "tcp4", "tcp6", "unix":
default:
fmt.Println("unsupported network protocol")
os.Exit(1)
}
ln, err := net.Listen(network, addr)
if err != nil {
log.Println(err)
os.Exit(1)
}
defer ln.Close()
log.Println("Covid19 Condition in Pakistan")
log.Printf("Service started: (%s) %s\n", network, addr)
for {
conn, err := ln.Accept()
if err != nil {
log.Println(err)
conn.Close()
continue
}
log.Println("Connected to ", conn.RemoteAddr())
go handleConnection(conn)
}
}
func handleConnection(conn net.Conn) {
defer func() {
if err := conn.Close(); err != nil {
log.Println("error closing connection:", err)
}
}()
reader := bufio.NewReaderSize(conn, 100)
for {
buf, err := reader.ReadBytes('|')
if err != nil {
if err != io.EOF {
log.Println("connection read error:", err)
return
}
}
reader.Reset(conn)
var req DataRequest
if err := json.Unmarshal(buf[:len(buf)-1], &req); err != nil {
log.Println("failed to unmarshal request:", string(buf), err)
cerr, jerr := json.Marshal(DataError{Error: err.Error()})
if jerr != nil {
log.Println("failed to marshal DataError:", jerr)
continue
}
if _, werr := conn.Write(cerr); werr != nil {
log.Println("failed to write to DataError:", werr)
return
}
continue
}
result := Find(patientsDetail, req.Get)
rsp, err := json.Marshal(&result)
if err != nil {
log.Println("failed to marshal data:", err)
if _, err := fmt.Fprintf(conn, `{"data_error":"internal error"}`); err != nil {
log.Printf("failed to write to client: %v", err)
return
}
continue
}
if _, err := conn.Write(rsp); err != nil {
log.Println("failed to write response:", err)
return
}
}
}
查询是：
╭─root@DESKTOP-OCDRD7Q ~
╰─# nc localhost 4040 127 ↵
{
"get": {
"Covid_Region": "Sindh",
"Covid_Date": "2020-03-20"
}
}|
[{"Covid_Positive":"1","Coivd_Performed":"1","Covid_Date":"2020-03-20","Covid_Discharged":"1","Covid_Expired":"1","Covid_Region":"Sindh","Covid_Admitted":"1"}]