requests.request 发送byte
时间: 2024-10-14 18:03:50 浏览: 9
`requests.request` 是 Python 的 requests 库中的一个函数,用于发送 HTTP 请求。如果需要发送字节(Byte),你可以通过设置 `data` 参数为 bytes 对象来进行。例如,如果你想发送一个二进制文件,可以这样做:
```python
import requests
file_data = b'\x00\x01\x02\x03' # 这里是一个字节序列
response = requests.request(
'POST', # 请求类型
'http://example.com/upload', # URL
data=file_data, # 设置数据为字节对象
headers={'Content-Type': 'application/octet-stream'} # 配置 Content-Type 为二进制
)
# 检查响应状态码
if response.status_code == 200:
print('上传成功')
else:
print(f'上传失败,状态码:{response.status_code}')
```
在这个例子中,`application/octet-stream` 表示我们正在发送的是不可识别的数据类型,通常用于上传文件。
相关问题
'gb2312' codec can't decode byte 0xa8 in position 0: illegal multibyte sequence
问题描述: 当使用Python抓取网页后,尝试使用decode解码时,报错信息为UnicodeDecodeError: 'gb2312' codec can't decode byte 0x8f in position 6018: illegal multibyte sequence。同样的问题也出现在读取yaml文件时,报错为UnicodeDecodeError: 'gbk' codec can't decode byte 0xa7 in position 265: illegal multibyte sequence。请问这是怎么回事,该如何解决?
回答: 这个问题的原因是使用了错误的编码方式进行解码。在第一个引用中提到,gb2312是中文老的编码方式,而最新的编码方式为gb18030,它的范围更大。因此,当网页或文件中存在一些gb2312无法解码的特殊符号时,就会出现解码错误。解决办法是将编码方式从gb2312替换为gb18030。这样就可以成功解码了。\[2\]
所以,对于第一个问题,你可以将html.decode("gb2312")改为html.decode("gb18030")来解决解码错误。对于第二个问题,你可以将编码方式从'gbk'改为'gb18030'来解决解码错误。\[1\]\[3\]
#### 引用[.reference_title]
- *1* [decode解码报错UnicodeDecodeError: 'gb2312' codec can't decode byte 0x8f in position 6018: illegal ...](https://blog.csdn.net/k53247l2/article/details/79340900)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [requests--request请求乱码问题](https://blog.csdn.net/qq_27056805/article/details/86444095)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [UnicodeDecodeError: ‘gbk‘ codec can‘t decode byte 0xa7 in position 265: illegal multibyte sequence](https://blog.csdn.net/qq_44368508/article/details/126831706)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]
stm32通过dma通道发送一个数组的hal库代码如何编写
可以使用以下代码进行编写:
```c
void HAL_UART_Transmit_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
{
/* Process Locked */
__HAL_LOCK(huart);
/* Check that a Tx process is not already ongoing */
if(huart->gState == HAL_UART_STATE_READY)
{
/* Change Tx state to busy */
huart->gState = HAL_UART_STATE_BUSY_TX;
/* Set the source address for DMA */
huart->pTxBuffPtr = pData;
/* Configure the DMA channel */
DMA_InitStructure.Direction = DMA_MEMORY_TO_PERIPH;
DMA_InitStructure.PeriphInc = DMA_PINC_DISABLE;
DMA_InitStructure.MemInc = DMA_MINC_ENABLE;
DMA_InitStructure.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
DMA_InitStructure.MemDataAlignment = DMA_MDATAALIGN_BYTE;
DMA_InitStructure.Mode = DMA_NORMAL;
DMA_InitStructure.Priority = DMA_PRIORITY_LOW;
/* Check the support of double buffer mode */
if(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
{
/* Activate the double buffer mode */
DMA_InitStructure.MemBurst = DMA_MBURST_INC16;
DMA_InitStructure.PeriphBurst = DMA_PBURST_INC16;
HAL_DMA_Init(huart->hdmatx);
/* Tx DMA Int enable */
__HAL_DMA_DISABLE_IT(huart->hdmatx, DMA_IT_TC);
__HAL_DMA_ENABLE_IT(huart->hdmatx, DMA_IT_TC);
}
else
{
/* Configure IT Tx DMA request */
__HAL_UART_ENABLE_IT(huart, UART_IT_TC);
HAL_DMA_Init(huart->hdmatx);
}
/* Enable the DMA channel */
HAL_DMA_Start_IT(huart->hdmatx, *(uint32_t*)&pData[0], *(uint32_t*)&huart->Instance->DR, Size);
/* Enable the UART DMA requests */
huart->Instance->CR3 |= USART_CR3_DMAT;
}
/* Process Unlocked */
__HAL_UNLOCK(huart);
}
```
使用上述代码时,需要在main函数中进行以下调用:
```c
uint8_t message[10] = "Hello, STM32";
HAL_UART_Transmit_DMA(&huart1, message, sizeof(message));
```
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