public async Task PreviewSendAsync(string accessTokenOrAppId, MaterialType materialType, string value, string wxName)
{
if (string.IsNullOrEmpty(value) || string.IsNullOrWhiteSpace(wxName))
{
return;
}
await GroupMessageApi.SendGroupMessagePreviewAsync(accessTokenOrAppId, GetGroupMessageType(materialType), value,
null, StringUtils.Trim(wxName));
}
/// <summary>
/// 预览图文消息-每日100次上限
/// </summary>
/// <param name="appId"></param>
/// <param name="openId"></param>
/// <param name="articleId"></param>
/// <returns></returns>
public async Task <SendResult> SendNewsPreviewAsync(string appId, string openId, string mediaId)
{
var wxRet = await GroupMessageApi.SendGroupMessagePreviewAsync(appId, GroupMessageType.mpnews, mediaId, openId);
return(wxRet);
}
/// <summary>
/// 推送到微信公共号
/// </summary>
/// <returns></returns>
public async Task <ActionResult> PushToWeixinAsync()
{
int maxTitleLength = 60;
// 获取新闻原内容
var news = _context.News
.Where(n => n.IsPublishToMP == false && n.CreatedTime.Date >= DateTime.Now.Date.AddDays(-5))
.OrderByDescending(n => n.CreatedTime)
.Take(10)
.ToList();
var random = new Random();
int number = random.Next(3, 6);
var blogs = _context.Blogs
.Where(b => b.IsPublishMP == false &&
b.Status != Data.Entity.Status.Obsolete &&
!string.IsNullOrEmpty(b.Content))
.OrderByDescending(b => b.UpdatedTime)
.Take(number)
.ToList();
try
{
var newsList = new List <NewsModel>();
var token = AccessTokenContainer.TryGetAccessToken(AppId, AppSecret);
DumpConsole("开始处理新闻");
// 新闻内容
if (news != null && news.Count > 0)
{
string content = "";
// 上传文章内图片
using (var wc = new WebClient())
{
var firstNews = news.FirstOrDefault();
foreach (var item in news)
{
var tempFileName = StringTools.GetTempFileName("jpg");
wc.DownloadFile(item.ThumbnailUrl + "&w=600", tempFileName);
var uploadImgResult = await MediaApi.UploadImgAsync(token, tempFileName);
System.IO.File.Delete(tempFileName);
// 替换图片链接
content += $@"<div class='row'>
<div class='news-title mt-1'>
<strong style='font-size:18px;color:#015cda'>{item.Title}</strong>
</div>
<div>
<img src='{uploadImgResult.url}' width='100%' />
</div>
<div class='news-description'>{item.Description}</div>
<br /><br />
</div>";
item.IsPublishToMP = true;
}
// 上传封面图片
wc.DownloadFile(firstNews?.ThumbnailUrl + "&w=600", "temp.jpg");
var thumbImg = await MediaApi.UploadForeverMediaAsync(token, "temp.jpg");
// TODO:上传后可删除
var mainNews = new NewsModel
{
author = "MSDev_NilTor",
thumb_media_id = thumbImg.media_id,
content = content,
title = "资讯一览:" + firstNews?.Title,
show_cover_pic = "0",
content_source_url = "https://guandian.tech",
digest = "",
};
mainNews.title = mainNews.title.Length > maxTitleLength?mainNews.title.Substring(0, maxTitleLength) : mainNews.title;
newsList.Add(mainNews);
}
}
DumpConsole("新闻处理完成");
DumpConsole("开始处理博客");
// 博客内容
if (blogs != null && blogs.Count > 0)
{
using (var hc = new HttpClient())
{
hc.Timeout = TimeSpan.FromSeconds(5);
var htmlDoc = new HtmlDocument();
try
{
foreach (var item in blogs)
{
// 处理文章内图片
htmlDoc.LoadHtml(item.Content);
var root = htmlDoc.DocumentNode;
var imageNodes = root.SelectNodes(".//img");
// 移除视频元素
var videoNodes = root.SelectNodes(".//video");
if (videoNodes != null && videoNodes.Count > 0)
{
foreach (var video in videoNodes)
{
root.SelectSingleNode(video.XPath).Remove();
}
}
string mediaId = "";
if (imageNodes != null)
{
for (int i = 0; i < imageNodes.Count; i++)
{
var url = imageNodes[i].GetAttributeValue("src", null);
// 只保留jpg图片
if (!url.EndsWith(".jpg"))
{
root.SelectSingleNode(imageNodes[i].XPath).Remove();
}
else
{
DumpConsole(item.Title + " 图片处理");
var image = imageNodes[i].Attributes["src"].Value;
var tempFileName = StringTools.GetTempFileName("jpg");
await DownloadFile(hc, image, tempFileName);
// 判断大小. TODO:处理图片大小
var file = new FileInfo(tempFileName);
if (file.Length > 1 * 1024 * 1024)
{
continue;
}
var uploadImgResult = await MediaApi.UploadImgAsync(token, tempFileName);
DumpConsole("上传图片" + image + " " + file.Length / 1024);
System.IO.File.Delete(tempFileName);
// 替换文本
imageNodes[i].SetAttributeValue("src", uploadImgResult.url);
// TODO:后面可删除该封面
}
}
}
// 缩略图
var mediaResult = await MediaApi.GetOthersMediaListAsync(token, Senparc.Weixin.MP.UploadMediaFileType.image, 0, 2);
var defaultMediaId = mediaResult.item?.FirstOrDefault()?.media_id;
// 下载缩略图，下载失败则使用默认图
var tempFileName1 = StringTools.GetTempFileName("jpg");
await DownloadFile(hc, item.Thumbnail, tempFileName1);
if (System.IO.File.Exists(tempFileName1))
{
var thumbImg = await MediaApi.UploadForeverMediaAsync(token, tempFileName1);
mediaId = thumbImg.media_id;
}
else
{
mediaId = defaultMediaId;
}
// 处理内容，微信消息最大长度为2W字符，小于1M
Console.WriteLine("长度:" + root.InnerHtml.Length);
if (root.InnerHtml.Length >= 20000)
{
root.InnerHtml = root.InnerHtml.Substring(0, 19500);
}
// 构造图文消息体
var currentNews = new NewsModel
{
author = item.AuthorName,
thumb_media_id = mediaId,
// html如果有#，会报错
content = root.InnerHtml.Replace("#", ""),
// 长度处理
title = item.Title.Length > maxTitleLength?item.Title.Substring(0, maxTitleLength) : item.Title,
show_cover_pic = "0",
content_source_url = "https://guandian.tech/blogs/detail/" + item.Id,
digest = "",
};
DumpConsole("博客标题:" + currentNews.title + "; 长度:" + currentNews.title.Length);
item.IsPublishMP = true;
newsList.Add(currentNews);
}
}
catch (Exception e)
{
DumpConsole(e.Message);
}
}
}
if (newsList.Count < 1)
{
DumpConsole("无可推送内容");
return(Ok());
}
// 上传图文
var uploadNewsResult = await MediaApi.UploadNewsAsync(token, news : newsList.ToArray());
if (uploadNewsResult.media_id != null)
{
var userList = await UserApi.GetAsync(token, null);
var firstUserOpenId = userList.data.openid.FirstOrDefault();
// 预览
var sendPreviewResult = await GroupMessageApi.SendGroupMessagePreviewAsync(token, Senparc.Weixin.MP.GroupMessageType.mpnews, uploadNewsResult.media_id, null, "EstNil");
// 群发消息
var sendNewsResult = await GroupMessageApi.SendGroupMessageByTagIdAsync(token, null, uploadNewsResult.media_id, Senparc.Weixin.MP.GroupMessageType.mpnews, true);
// 未成功则删除上传的素材
if (sendNewsResult.errcode != 0)
{
var deleteResult = await MediaApi.DeleteForeverMediaAsync(token, uploadNewsResult.media_id);
}
else
{
// 成功后更新数据库标识
_context.UpdateRange(news);
_context.UpdateRange(blogs);
_context.SaveChanges();
}
}
}
catch (Exception e)
{
DumpConsole(e.Message + e.InnerException);
}
return(Ok());
}