为ipa创建URL。链接不工作

我创建了三个文件来下载ipa。但链接不起作用,这意味着我无法从浏览器下载应用程序。

MyProject.ipa
manifest.plist
a.html

显示plist公司

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>items</key>
    <array>
        <dict>
            <key>assets</key>
            <array>
                <dict>
                    <key>kind</key>
                    <string>software-package</string>
                    <key>url</key>                        <string>https://www.dropbox.com/s/testUser/MyProject.ipa?dl=0</string> 
                </dict>
            </array>
            <key>metadata</key>
            <dict>
                <key>bundle-identifier</key>
                <string>com.ttt.app</string>
                <key>bundle-version</key>
                <string>1.0.0</string>
                <key>kind</key>
                <string>software</string>
                <key>title</key>
                <string>app</string>
            </dict>
        </dict>
    </array>
</dict>

a、 html

<a href="itms-services://?action=download-manifest&url=https://www.dropbox.com/s/testUser/manifest.plist?dl=0">Install App</a>  

请帮助查找我的问题。谢谢大家。:)