请求数据中的DJANGO OPENCENSUS url字段太长

Question

自从将App Insights添加到我的应用程序后，我就遇到了与this question类似的问题。它可能也与this other question有关，但它们都与App Insights没有直接关系，也没有解决方案。

这是django-tasks.log文件中的错误

Data drop 400: 100: Field 'url' on type 'RequestData' is too long. Expected: 2048 characters, Actual: 3701 {'iKey': <uuid>, 'tags': {'ai.cloud.role': 'manage.py', 'ai.cloud.roleInstance': <instance>, 'ai.device.id': <device>, 'ai.device.locale': 'en_US', 'ai.device.osVersion': '#1 SMP Tue Aug 25 17:23:54 UTC 2020', 'ai.device.type': 'Other', 'ai.internal.sdkVersion': 'py3.6.12:oc0.7.11:ext1.0.4', 'ai.operation.id': 'fcbe18bf6ca9036aa4546af171f3e877', 'ai.operation.name': 'GET /<my_url>/'}, 'time': '2020-12-15T17:58:36.498868Z', 'name': 'Microsoft.ApplicationInsights.Request', 'data': {'baseData': {'id': '116a0658b513bdb9', 'duration': '0.00:00:00.096', 'responseCode': '200', 'success': True, 'properties': {'request.name': 'GET /<my_url>/', 'request.url': 'https://<my host>/<my_url>/?<my very long query string>', 'django.user.id': '90', 'django.user.name': '100044505'}, 'ver': 2, 'name': 'GET /<my_url>/', 'url': 'https://<my host>/<my_url>/?<my very long query string>', 'source': None, 'measurements': None}, 'baseType': 'RequestData'}, 'ver': 1, 'sampleRate': None, 'seq': None, 'flags': None}.

我们在日志中也看到了重复的情况。

Queue is full. Dropping telemetry.
Queue is full. Dropping telemetry.
Queue is full. Dropping telemetry.
Queue is full. Dropping telemetry.
Queue is full. Dropping telemetry.
Queue is full. Dropping telemetry.

我可以重写应用程序来使用更短的查询，但这似乎是错误的答案。有没有办法将django配置为支持长URL？

Answer 1

缓冲区不能更改，但您可以使用筛选器限制URL的大小。为了定制导出的跟踪，必须单独实例化它。

def shorten_url(envelope):
if 25 < len(envelope.data.baseData.url):
    envelope.data.baseData["url"] = envelope.data.baseData.url[:25]+"..." 
return True

from opencensus.ext.azure.trace_exporter import AzureExporter
exporter = AzureExporter(service_name='mysite')
exporter.add_telemetry_processor(shorten_url)

OPENCENSUS = {
    'TRACE': {
         'SAMPLER': 'opencensus.trace.samplers.ProbabilitySampler(rate=1)',
         'EXPORTER': exporter
     #Assumes Environmental Variable 'APPINSIGHTS_INSTRUMENTATIONKEY'
    }
}

完整的工作示例：https://github.com/Gamecock/Django-appinsights-example