Initial commit

cmd/elpaisreader/elpaisreader.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strings"
+)
+
+const beginningToken = "\"articleBody\""
+const endToken = ",\"keywords\":"
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Fprintf(os.Stderr, "USAGE: %s URL\n", os.Args[0])
+		os.Exit(-1)
+	}
+
+	url := os.Args[1]
+
+	if url == "-h" || url == "--help" {
+		fmt.Fprintf(os.Stderr, "USAGE: %s URL\n", os.Args[0])
+		os.Exit(2)
+	}
+
+	resp, err := http.Get(url)
+	if err != nil {
+		panic(err)
+	}
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		panic(err)
+	}
+
+	theLine := ""
+	for _, line := range strings.Split(string(body), "\n") {
+		if strings.Contains(line, beginningToken) {
+			theLine = line
+		}
+	}
+
+	if theLine == "" {
+		panic("articleBody not found")
+	}
+
+	index := strings.Index(theLine, beginningToken)
+	endIndex := strings.Index(theLine, endToken)
+
+	if index == -1 || endIndex == -1 {
+		panic("cannot determine limits")
+	}
+
+	if index > endIndex {
+		panic("end found before beginning")
+	}
+
+	theLine = theLine[index+len(beginningToken)+2 : endIndex-1]
+
+	fmt.Println(theLine)
+}

go.mod

@@ -0,0 +1,3 @@
+module git.ctrlz.es/mgdelacroix/elpaisreader
+
+go 1.17