一转眼好几年没有写博客了，来博客园冒个泡，最近由于工作需要，内网办公，幸运的是只需要上传一个*.nupkg一个包信息就可以在私有nuget下载到了，下面就用PowerShell编写下载脚本，需要注意的是PowerShell后缀ps1（最后一个数字1），以Newtonsoft.Json为例：
下载地址
# 设置NuGet包列表的URL $packageName = "Newtonsoft.Json" $targetHttp = "https://www.nuget.org/packages/" $targetUrl = "{0}{1}" -f $targetHttp, $packageName
保存地址
# 设置保存已下载包的目录 $outputDirectory = "D:nuget_packages" if (-not (Test-Path $outputDirectory)) { New-Item -Path $outputDirectory -ItemType Directory }
解析下载版本地址
定义下载需要解析的包地址
# 定义下载前缀 $httpPrefix = "https://www.nuget.org/api/v2/package/" # 下载html文件内容 $htmlContent = Invoke-WebRequest -Uri $targetUrl -UseBasicParsing | Select-Object -ExpandProperty Content # 匹配标签 $pattern = "<.*?>" $matches = [regex]::Matches($htmlContent, $pattern)
获取所有a标签
foreach ($match in $matches) { $tag = $match.Value # 获取a标签 if ($tag -like "<a href=*") { Write-Host $tag } }
输出结果
<a href="#" id="skipToContent" class="showOnFocus" title="Skip To Content"> ... <a href="/packages/System.Xml.XmlDocument/"> <a href="/packages/Newtonsoft.Json/13.0.3" title="13.0.3"> ... <a href="/packages/Newtonsoft.Json/3.5.8" title="3.5.8"> <a href="/stats/packages/Newtonsoft.Json?groupby=Version" title="Package Statistics"> ... <a href="/packages/Newtonsoft.Json/13.0.3/ReportAbuse" title="Report the package as abusive"> <a href="/packages/Newtonsoft.Json/13.0.3/ContactOwners" title="Ask the package owners a question"> ...
观察上一步结果可以看出来每一个版本都有title，且title内容是版本
# 获取含有title的a标签 if ($tag -like "*title=*") { Write-Host $tag }
输出结果
<a href="#" id="skipToContent" class="showOnFocus" title="Skip To Content"> <a href="/packages/Newtonsoft.Json/13.0.3" title="13.0.3"> ... <a href="/packages/Newtonsoft.Json/3.5.8" title="3.5.8"> <a href="/stats/packages/Newtonsoft.Json?groupby=Version" title="Package Statistics"> <a href="https://www.newtonsoft.com/json" data-track="outbound-project-url" title="Visit the project site to learn more about this package" rel="nofollow">
... <a href="/packages/Newtonsoft.Json/13.0.3/ReportAbuse" title="Report the package as abusive"> <a href="/packages/Newtonsoft.Json/13.0.3/ContactOwners" title="Ask the package owners a question"> <a href="/packages?q=Tags%3A%22json%22" title="Search for json" class="tag">
接着上一步的结果继续过滤
# 截取href的内容 $substr = $tag.Substring(9) if ($substr -like "/packages/*") { Write-Host $substr }
输出结果
/packages/Newtonsoft.Json/13.0.3" title="13.0.3"> ... /packages/Newtonsoft.Json/3.5.8" title="3.5.8"> /packages/Newtonsoft.Json/13.0.3/ReportAbuse" title="Report the package as abusive"> /packages/Newtonsoft.Json/13.0.3/ContactOwners" title="Ask the package owners a question">
有完没完，又来了？看上面的结果就还差过滤两个不相关的了，
获取href完整内容
# 查找第一个双引号的位置 $index = $substr.IndexOf('"') # 获取部分/packages/Newtonsoft.Json/13.0.3 $substr = $substr.Substring(0,$index)
剔除最后两个版本无关的a标签
# 排除报告滥用a标签
if ($substr -notlike "*/ReportAbuse") { # 排除联系作者a标签 if ($substr -notlike "*/ContactOwners") { # 匹配版本
$endIndex = $substr.LastIndexOf('/') $startPackageIndex = $endIndex + 1 $packageVersion = $substr.Substring($startPackageIndex) } }
Invoke-WebRequest命令下载并保存文件
# 下载地址nupkg
$packageUrl = "{0}{1}/{2}" -f $httpPrefix,$packageName,$packageVersion # 生成保存文件的路径 $packageFile = Join-Path -Path $outputDirectory -ChildPath "$packageName.$packageVersion.nupkg" # 下载 .nupkg 文件 Write-Host "Downloading $packageName version $packageVersion from $packageUrl" Invoke-WebRequest -Uri $packageUrl -OutFile $packageFile
全部代码
# 设置NuGet包列表的URL $packageName = "Newtonsoft.Json" $targetHttp = "https://www.nuget.org/packages/" $targetUrl = "{0}{1}" -f $targetHttp, $packageName # 设置保存已下载包的目录 $outputDirectory = "D:nuget_packages" if (-not (Test-Path $outputDirectory)) { New-Item -Path $outputDirectory -ItemType Directory } # 定义下载前缀 $httpPrefix = "https://www.nuget.org/api/v2/package/" # 下载html文件内容 $htmlContent = Invoke-WebRequest -Uri $targetUrl -UseBasicParsing | Select-Object -ExpandProperty Content # 匹配标签 $pattern = "<.*?>" $matches = [regex]::Matches($htmlContent, $pattern) foreach ($match in $matches) { $tag = $match.Value # 获取a标签 if ($tag -like "<a href=*") { # 获取含有title的a标签 if ($tag -like "*title=*") { # 截取href的内容 $substr = $tag.Substring(9) if ($substr -like "/packages/*") { # 查找第一个双引号的位置 $index = $substr.IndexOf('"') # 获取部分/packages/Newtonsoft.Json/13.0.3 $substr = $substr.Substring(0,$index) # 排除报告滥用a标签 if ($substr -notlike "*/ReportAbuse") { # 排除联系作者a标签 if ($substr -notlike "*/ContactOwners") { # 匹配版本 $endIndex = $substr.LastIndexOf('/') $startPackageIndex = $endIndex + 1 $packageVersion = $substr.Substring($startPackageIndex) # 下载地址nupkg $packageUrl = "{0}{1}/{2}" -f $httpPrefix,$packageName,$packageVersion # 生成保存文件的路径 $packageFile = Join-Path -Path $outputDirectory -ChildPath "$packageName.$packageVersion.nupkg" # 下载 .nupkg 文件 Write-Host "Downloading $packageName version $packageVersion from $packageUrl" Invoke-WebRequest -Uri $packageUrl -OutFile $packageFile } } } } } } # 执行结束暂停 $null = Read-Host
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