普通模式和SSE模式说明

普通模式

在普通模式下，给服务端发送的每个请求都会收到一个数据包作为结果。

HTTP/1.1 200 OK
Server: AliyunOSS
Date: Mon, 07 Aug 2023 09:44:02 GMT
Content-Type: application/json;charset=UTF-8
Connection: close
Vary: Accept-Encoding
x-oss-request-id: 64D0BCDD88339E32330E2D1D
x-oss-server-time: 5865
Content-Encoding: gzip

{
  "RequestID": "64D0BCDD88339E32330E2D1D",
  "Output": {
    "Text": "A Ghost, the Communist Ghost, haunts the European continent. In order to holy suppression of this ghost, all forces of the old Europe, including the Pope and the Czar, Metternich and Guizot, the radical party in France and the police in Germany, have united. Is there any opposition party that is not denounced by its governing enemies as a Communist? And is there any opposition party that does not use the charge of Communism as a weapon against more progressive oppositionists and its reactionary enemies? From this fact we can draw two conclusions: Communism has been recognized by all the forces of Europe as a power; it is now the turn of the Communists to make themselves known to the world, to state their views, their aims, their intentions, and to publish their own manifestos in order to refute the myth about the Communist ghost. For this purpose, delegates of the Communist parties of all countries assembled in London and adopted the following manifesto, which is published in English, French, German, Italian, Flemish and Danish.",
    "FinishReason": "stop"
  }
}

SSE模式

SSE模式，即Server-Sent Events的简称，是一种服务器端到客户端（浏览器）的单向事件推送。EventSource接口是HTML5规范的一部分。

SSE推送的消息是UTF-8编码的纯文本。每次推送由若干个事件消息组成，每个事件消息之间用两个换行分割（\n\n）。事件消息中由若干行组成，每行以[key]: value\n的键值对组成。其中key可选项为id、event和data。data中的内容是消息本身。

在智能文档服务的实现中，data中的内容为一个JSON结构体，结构内容为文档中返回参数介绍。

在一次请求中，您收到的结果如下所示：

HTTP/1.1 200 OK
Server: AliyunOSS
Date: Mon, 07 Aug 2023 09:44:36 GMT
Content-Type: text/event-stream;charset=UTF-8
Transfer-Encoding: chunked
Connection: close
x-oss-request-id: 64D0BD0388339E30331D2D1D
x-oss-server-time: 761

id: 0
event: message
data: {"RequestId":"","Output":{"Text":"A Ghost,","FinishReason":"null"},"Usage":{"InputTokens":320,"OutputTokens":3}}

id: 1
event: message
data: {"RequestId":"","Output":{"Text":"A Ghost, the Communist Ghost, haunts the European","FinishReason":"null"},"Usage":{"InputTokens":320,"OutputTokens":11}}

id: 2
event: message
data: {"RequestId":"","Output":{"Text":"A Ghost, the Communist Ghost, haunts the European continent. In order to holy suppression of","FinishReason":"null"},"Usage":{"InputTokens":320,"OutputTokens":19}}

......

id: 27
event: Result
data: {"RequestId":"","Output":{"Text":"A Ghost, the Communist Ghost, haunts the European continent. In order to holy suppression of this ghost, all forces of the old Europe, including the Pope and the Czar, Metternich and Guizot, the radical party in France and the police in Germany, have united. Is there any opposition party that is not denounced by its governing enemies as a Communist? And is there any opposition party that does not use the charge of Communism as a weapon against more progressive oppositionists and its reactionary enemies? From this fact we can draw two conclusions: Communism has been recognized by all the forces of Europe as a power; it is now the turn of the Communists to make themselves known to the world, to state their views, their aims, their intentions, and to publish their own manifestos in order to refute the myth about the Communist ghost. For this purpose, delegates of the Communist parties of all countries assembled in London and adopted the following manifesto, which is published in English, French, German, Italian, Flemish and Danish.","FinishReason":"stop"},"Usage":{"InputTokens":320,"OutputTokens":212}}

其中每次事件中的消息内容包含着全量的数据，也就是在请求中data内容不断变长。