微信400 bad request，求高手帮忙！

一日夜 2014-12-01 05:11:26

这是我调用微信的send接口向用户发送消息的json数据，
{"news":{"articles":[{"picurl":"http://payment.bankcomm.com/robot/imgmsgData/360bc12618eb4c078d2087178227580c/appmsgItem1.jpg?t=1385375566239","title":"点击搜索，优惠享不停","description":"","url":"http://payment.bankcomm.com/content/pccc-phone/merchant/wxmerchant.html"},{"picurl":"http://payment.bankcomm.com/robot_kf/img/5462.jpg","title":"毂屋【距离0.6km】\n刷卡消费可享受培根牛肉汉...","description":"","url":"http://creditcard.bankcomm.com/content/pccc-phone/merchant/wxmerchant.detail.html?id=ff80808140851a790140851b6e830093"},{"picurl":"http://payment.bankcomm.com/robot_kf/img/5462.jpg","title":"一茶一坐张江高科店【距离0.6km】\n刷卡消费可享受会员价优惠...","description":"","url":"http://creditcard.bankcomm.com/content/pccc-phone/merchant/wxmerchant.detail.html?id=ff808081416c4ee601416c4f49080045"},{"picurl":"http://payment.bankcomm.com/robot_kf/img/5462.jpg","title":"蛙香馆上海传奇店【距离0.6km】\n刷卡消费可享受8.8折...","description":"","url":"http://creditcard.bankcomm.com/content/pccc-phone/merchant/wxmerchant.detail.html?id=ff8080813daf1dfe013daf1e46b00020"},{"picurl":"http://payment.bankcomm.com/robot_kf/img/5462.jpg","title":"顾姐小厨【距离0.6km】\n刷卡消费可享受9折优惠(...","description":"","url":"http://creditcard.bankcomm.com/content/pccc-phone/merchant/wxmerchant.detail.html?id=3634ba672f9b8750012f9b8a12f03df9"},{"picurl":"http://payment.bankcomm.com/robot_kf/img/5462.jpg","title":"康师傅私房牛肉面张江店【距离0.6km】\n刷卡消费可享受8.8折优...","description":"","url":"http://creditcard.bankcomm.com/content/pccc-phone/merchant/wxmerchant.detail.html?id=36349103363e030b01364930ef220e85"},{"picurl":"http://payment.bankcomm.com/robot_kf/img/5462.jpg","title":"权味张江店【距离0.6km】\n刷卡消费可享受9折优惠(...","description":"","url":"http://creditcard.bankcomm.com/content/pccc-phone/merchant/wxmerchant.detail.html?id=3634ba672f9b8750012f9b88a6311da8"},{"picurl":"http://payment.bankcomm.com/robot_kf/img/5462.jpg","title":"禾绿张江店【距离0.6km】\n","description":"","url":"http://creditcard.bankcomm.com/content/pccc-phone/merchant/wxmerchant.detail.html?id=3634ba672f9b8750012f9b896a7b2f94"}]},"touser":"o_WQPuK_jWBnojxY4VdPAiB-n7Cc","msgtype":"news"}

微信没有响应，看日志是400 bad request的错误，
Response = <html>
<head><title>400 Bad Request</title></head>
<body bgcolor="white">
<center><h1>400 Bad Request</h1></center>
<hr><center>nginx/1.4.4</center>
</body>
</html>

我代码报错是json解析出了问题，但是上面的json格式是对的。大家有没有遇到这个问题？不管有或者没有欢迎大家来交流意见，谢谢！

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