http post 和 put 请求可以包含要提交的内容。只需要在创建 request 对象时，通过 post 和 put 方法来指定要提交的内容即可。
http post 请求的基本示例：
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public class poststring {
public static void main(string[] args) throws ioexception {
okhttpclient client = new okhttpclient();
mediatype media_type_text = mediatype.parse("text/plain");
string postbody = "hello world";
request request = new request.builder()
.url("http://www.baidu.com")
.post(requestbody.create(media_type_text, postbody))
.build();
response response = client.newcall(request).execute();
if (!response.issuccessful()) {
throw new ioexception("服务器端错误: " + response);
}
system.out.println(response.body().string());
}
}
以 string 类型提交内容只适用于内容比较小的情况。当请求内容较大时，应该使用流来提交。
post方式提交流
以流的方式post提交请求体。请求体的内容由流写入产生。这个例子是流直接写入 okio 的bufferedsink。你的程序可能会使用 outputstream ，你可以使用 bufferedsink.outputstream() 来获取。
public static final mediatype media_type_markdown
= mediatype.parse("text/x-markdown; charset=utf-8");
private final okhttpclient client = new okhttpclient();
public void run() throws exception {
requestbody requestbody = new requestbody() {
@override public mediatype contenttype() {
return media_type_markdown;
}
@override public void writeto(bufferedsink sink) throws ioexception {
sink.writeutf8("numbers\n");
sink.writeutf8("-------\n");
for (int i = 2; i <= 997; i++) {
sink.writeutf8(string.format(" * %s = %s\n", i, factor(i)));
}
}
private string factor(int n) {
for (int i = 2; i < n; i++) {
int x = n / i;
if (x * i == n) return factor(x) + " × " + i;
}
return integer.tostring(n);
}
};
request request = new request.builder()
.url("https://api.github.com/markdown/raw")
.post(requestbody)
.build();
response response = client.newcall(request).execute();
if (!response.issuccessful()) throw new ioexception("unexpected code " + response);
system.out.println(response.body().string());
}
post方式提交文件
以文件作为请求体是十分简单的。
public static final mediatype media_type_markdown
= mediatype.parse("text/x-markdown; charset=utf-8");
private final okhttpclient client = new okhttpclient();
public void run() throws exception {
file file = new file("readme.md");
request request = new request.builder()
.url("https://api.github.com/markdown/raw")
.post(requestbody.create(media_type_markdown, file))
.build();
response response = client.newcall(request).execute();
if (!response.issuccessful()) throw new ioexception("unexpected code " + response);
system.out.println(response.body().string());
}
post方式提交表单
使用 formencodingbuilder 来构建和html <form> 标签相同效果的请求体。键值对将使用一种html兼容形式的url编码来进行编码。
private final okhttpclient client = new okhttpclient();
public void run() throws exception {
requestbody formbody = new formencodingbuilder()
.add("search", "jurassic park")
.build();
request request = new request.builder()
.url("https://en.wikipedia.org/w/index.php")
.post(formbody)
.build();
response response = client.newcall(request).execute();
if (!response.issuccessful()) throw new ioexception("unexpected code " + response);
system.out.println(response.body().string());
}
post方式提交分块请求
multipartbuilder 可以构建复杂的请求体，与html文件上传形式兼容。多块请求体中每块请求都是一个请求体，可以定义自己的请求头。这些请求头可以用来描述这块请求，例如他的 content-disposition 。如果 content-length 和 content-type 可用的话，他们会被自动添加到请求头中。
private static final string imgur_client_id = "...";
private static final mediatype media_type_png = mediatype.parse("image/png");
private final okhttpclient client = new okhttpclient();
public void run() throws exception {
// use the imgur image upload api as documented at https://api.imgur.com/endpoints/image
requestbody requestbody = new multipartbuilder()
.type(multipartbuilder.form)
.addpart(
headers.of("content-disposition", "form-data; name=\"title\""),
requestbody.create(null, "square logo"))
.addpart(
headers.of("content-disposition", "form-data; name=\"image\""),
requestbody.create(media_type_png, new file("website/static/logo-square.png")))
.build();
request request = new request.builder()
.header("authorization", "client-id " + imgur_client_id)
.url("https://api.imgur.com/3/image")
.post(requestbody)
.build();
response response = client.newcall(request).execute();
if (!response.issuccessful()) throw new ioexception("unexpected code " + response);
system.out.println(response.body().string());
}
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