go-readability/main.go

package main

/*
#include <stdlib.h>

typedef struct {
	char* title;
	char* author;
	int length;
	char* excerpt;
	char* site_name;
	char* image_url;
	char* favicon_url;
	char* content; // HTML content
	char* text_content; // text content
	char* language;
	char* published_time;
	char* err;
	int success;
} CArticle;
*/
import "C"
import (
	"time"
	"unsafe"

	"github.com/go-shiori/go-readability"
)

//export Parse
func Parse(url *C.char) (result C.CArticle) {
	goURL := C.GoString(url)
	article, err := readability.FromURL(goURL, 30*time.Second)
	if err != nil {
		return C.CArticle{
			err: C.CString(err.Error()),
			success: 0,
		}
	}

	return C.CArticle{
		title:        C.CString(article.Title),
		author:       C.CString(article.Byline),
		length:       C.int(article.Length),
		excerpt:      C.CString(article.Excerpt),
		site_name:     C.CString(article.SiteName),
		image_url:    C.CString(article.Image),
		favicon_url:  C.CString(article.Favicon),
		content:      C.CString(article.Content),
		text_content: C.CString(article.TextContent),
		err:		  nil,
		success:      1,
	}
}

//export FreeArticle
func FreeArticle(article C.CArticle) {
    if article.title != nil {
        C.free(unsafe.Pointer(article.title))
    }
    if article.author != nil {
        C.free(unsafe.Pointer(article.author))
    }
    if article.excerpt != nil {
        C.free(unsafe.Pointer(article.excerpt))
    }
    if article.site_name != nil {
        C.free(unsafe.Pointer(article.site_name))
    }
    if article.image_url != nil {
        C.free(unsafe.Pointer(article.image_url))
    }
    if article.favicon_url != nil {
        C.free(unsafe.Pointer(article.favicon_url))
    }
    if article.content != nil {
        C.free(unsafe.Pointer(article.content))
    }
    if article.text_content != nil {
        C.free(unsafe.Pointer(article.text_content))
    }
    if article.language != nil {
        C.free(unsafe.Pointer(article.language))
    }
    if article.published_time != nil {
        C.free(unsafe.Pointer(article.published_time))
    }
}
func main() {

}