AWTK fscript 中的 TCP/UDP 客户端扩展函数

fscript 是 AWTK 内置的脚本引擎，开发者可以在 UI XML 文件中直接嵌入 fscript 脚本，提高开发服从。本文介绍一下 fscript 中的 TCP/UDP 客户端扩展函数。
1.iostream_tcp_create

   创建 TCP 客户端输入输出流对象。
  

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原型

1. iostream_tcp_create(host, port) => object

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示例

1. var a = iostream_tcp_create("localhost", 1234);

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2.iostream_udp_create

   创建 UDP 客户端输入输出流对象。
  

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原型

1. iostream_udp_create(host, port) => object

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示例

1. var a = iostream_udp_create("localhost", 4000);

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完备示例

1. //
2. //start tcp echo server first
3. //socat -v tcp-l:1234,fork exec:'/bin/cat'
4. //
6. var a = iostream_tcp_create("localhost", 1234)
7. var b = iostream_get_ostream(a)
8. var c = iostream_get_istream(a)
10. assert(ostream_write_uint8(b, 1) == 1)
11. assert(ostream_write_uint16(b, 2)== 2)
12. assert(ostream_write_uint32(b, 3) == 4)
13. assert(ostream_write_uint64(b, 4) == 8)
14. assert(ostream_write_float(b, 5) == 4)
15. assert(ostream_write_double(b, 6) == 8)
16. assert(ostream_write_string(b, "hello\n") == 6)
18. assert(istream_read_uint8(c) == 1)
19. assert(istream_read_uint16(c) == 2)
20. assert(istream_read_uint32(c) == 3)
21. assert(istream_read_uint64(c) == 4)
22. assert(istream_read_float(c) == 5)
23. assert(istream_read_double(c) == 6)
24. assert(istream_read_string(c, 6) == "hello\n")

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1. //
2. // start udp echo server first
3. // ./bin/udp_recv 4000
4. //
6. var a = iostream_udp_create("localhost", 4000)
7. var b = iostream_get_ostream(a)
8. var c = iostream_get_istream(a)
10. assert(ostream_write_uint8(b, 1) == 1)
11. assert(ostream_write_uint16(b, 2)== 2)
12. assert(ostream_write_uint32(b, 3) == 4)
13. assert(ostream_write_uint64(b, 4) == 8)
14. assert(ostream_write_float(b, 5) == 4)
15. assert(ostream_write_double(b, 6) == 8)
16. assert(ostream_write_string(b, "hello\n") == 6)
18. assert(istream_read_uint8(c) == 1)
19. assert(istream_read_uint16(c) == 2)
20. assert(istream_read_uint32(c) == 3)
21. assert(istream_read_uint64(c) == 4)
22. assert(istream_read_float(c) == 5)
23. assert(istream_read_double(c) == 6)
24. assert(istream_read_string(c, 6) == "hello\n")

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