示例：停止或启动文件夹中的所有服务

本示例将通读某一指定的 GIS 服务器文件夹，并根据用户提供的参数停止或启动其中包含的所有服务。 如果用户尝试启动一个已启动的服务，或停止一个已停止的服务，则脚本将继续处理文件夹中的下一个服务。

运行此脚本时，您需要提供一个具有 ArcGIS Server 管理权限的用户名和密码。 利用此信息可获取一个令牌，以便允许您作出读取文件夹以及停止和启动服务的 Web 服务调用。

您还需要提供服务器名称以及要停止或启动服务的文件夹。 您可以提供根文件夹的 root，但请注意，对根文件夹进行迭代将会影响预先配置的几何服务和搜索服务。

最终参数会询问是否要停止或启动文件夹中的所有服务。 使用 ArcGIS REST API 停止和启动服务的 Web 服务调用非常相似，因此，在此脚本中允许这两种操作并不困难。

初次请求文件夹中的服务列表时，响应将以 JavaScript 对象表示法 (JSON) 的形式返回。 Python 的 json.loads() 函数将 JSON 转换成一个可迭代的 Python 对象。

尽管此脚本包含一些错误检查和报告，但是为简洁起见，已排除了这些内容。

# Demonstrates how to stop or start all services in a folder

# For Http calls
import httplib, urllib, json

# For system tools
import sys

# For reading passwords without echoing
import getpass


# Defines the entry point into the script
def main(argv=None):
    # Print some info
    print
    print "This tool is a sample script that stops or starts all services in a folder."
    print  
    
    # Ask for admin/publisher user name and password
    username = raw_input("Enter user name: ")
    password = getpass.getpass("Enter password: ")
    
    # Ask for server name
    serverName = raw_input("Enter server name: ")
    serverPort = 6080

    folder = raw_input("Enter the folder name or ROOT for the root location: ")
    stopOrStart = raw_input("Enter whether you want to START or STOP all services: ")

    # Check to make sure stop/start parameter is a valid value
    if str.upper(stopOrStart) != "START" and str.upper(stopOrStart) != "STOP":
        print "Invalid STOP/START parameter entered"
        return
    
    # Get a token
    token = getToken(username, password, serverName, serverPort)
    if token == None:
        print "Could not generate a token with the username and password provided."
        return
    
    # Construct URL to read folder
    if str.upper(folder) == "ROOT":
        folder = ""
    else:
        folder += "/"
            
    folderURL = "/arcgis/admin/services/" + folder
    
    # This request only needs the token and the response formatting parameter 
    params = urllib.urlencode({'token': token, 'f': 'json'})
    
    headers = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
    
    # Connect to URL and post parameters    
    httpConn = httplib.HTTPConnection(serverName, serverPort)
    httpConn.request("POST", folderURL, params, headers)
    
    # Read response
    response = httpConn.getresponse()
    if (response.status != 200):
        httpConn.close()
        print "Could not read folder information."
        return
    else:
        data = response.read()
        
        # Check that data returned is not an error object
        if not assertJsonSuccess(data):          
            print "Error when reading folder information. " + str(data)
        else:
            print "Processed folder information successfully. Now processing services..."

        # Deserialize response into Python object
        dataObj = json.loads(data)
        httpConn.close()

        # Loop through each service in the folder and stop or start it    
        for item in dataObj['services']:

            fullSvcName = item['serviceName'] + "." + item['type']

            # Construct URL to stop or start service, then make the request                
            stopOrStartURL = "/arcgis/admin/services/" + folder + fullSvcName + "/" + stopOrStart
            httpConn.request("POST", stopOrStartURL, params, headers)
            
            # Read stop or start response
            stopStartResponse = httpConn.getresponse()
            if (stopStartResponse.status != 200):
                httpConn.close()
                print "Error while executing stop or start. Please check the URL and try again."
                return
            else:
                stopStartData = stopStartResponse.read()
                
                # Check that data returned is not an error object
                if not assertJsonSuccess(stopStartData):
                    if str.upper(stopOrStart) == "START":
                        print "Error returned when starting service " + fullSvcName + "."
                    else:
                        print "Error returned when stopping service " + fullSvcName + "."

                    print str(stopStartData)
                    
                else:
                    print "Service " + fullSvcName + " processed successfully."

            httpConn.close()           
        
        return


# A function to generate a token given username, password and the adminURL.
def getToken(username, password, serverName, serverPort):
    # Token URL is typically http://server[:port]/arcgis/admin/generateToken
    tokenURL = "/arcgis/admin/generateToken"
    
    params = urllib.urlencode({'username': username, 'password': password, 'client': 'requestip', 'f': 'json'})
    
    headers = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
    
    # Connect to URL and post parameters
    httpConn = httplib.HTTPConnection(serverName, serverPort)
    httpConn.request("POST", tokenURL, params, headers)
    
    # Read response
    response = httpConn.getresponse()
    if (response.status != 200):
        httpConn.close()
        print "Error while fetching tokens from admin URL. Please check the URL and try again."
        return
    else:
        data = response.read()
        httpConn.close()
        
        # Check that data returned is not an error object
        if not assertJsonSuccess(data):            
            return
        
        # Extract the token from it
        token = json.loads(data)        
        return token['token']            
        

# A function that checks that the input JSON object 
#  is not an error object.
def assertJsonSuccess(data):
    obj = json.loads(data)
    if 'status' in obj and obj['status'] == "error":
        print "Error: JSON object returns an error. " + str(obj)
        return False
    else:
        return True
    
        
# Script start
if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))